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Influence of human activity on gut microbiota and immune responses of Darwin’s finches in the Galápagos Islands Avian Conserv. Ecol. (IF 1.4) Pub Date : 2024-03-31 Jada N. Bygrave, Ashley C. Love, Maxine Zylberberg, Alyssa Addesso, Sarah A. Knutie
Urbanization can influence many environmental factors that can affect the condition, immunity, and gut microbiota of birds. Over the past several decades, the Galápagos Islands of Ecuador have experienced increasing human activity, which has led to recent changes in the morphology, gut microbiota, and immunity of Darwin’s finches. However, these traits have not been characterized before the exponential
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Survival of fallen and returned rooftop nesting Least Tern chicks Avian Conserv. Ecol. (IF 1.4) Pub Date : 2024-03-31 Elizabeth A. Forys, Marianne G. Korosy, Jeff Leighty
Beach habitat is increasingly degraded and disturbed, and many species of Larids (gulls, terns, and skimmers) have adapted to nesting on gravel rooftops. In the southeastern United States, the most common rooftop nester is the Least Tern (Sternula antillarum), and rooftop tern colonies are generally as productive as beach colonies. One problem with rooftop nesting is that chicks often fall from the
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Response of corvid nest predators to thinning: implications for balancing short- and long-term goals for restoration of forest habitat Avian Conserv. Ecol. (IF 1.4) Pub Date : 2024-01-31 Joan C. Hagar, Theodore Owen, Thomas K. Stevens, Lorraine K. Waianuhea
Forest thinning on public lands in the Pacific Northwest USA is an important tool for restoring diversity in forest stands with a legacy of simplified structure from decades of intensive management for timber production. A primary application of thinning in young (< 50-year-old) stands is to accelerate forest development to mitigate loss of late-seral habitat to decades of logging. However, thinning
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Nesting phenology of migratory songbirds in an eastern Canadian boreal forest, 1996–2020 Avian Conserv. Ecol. (IF 1.4) Pub Date : 2024-01-31 Sara Boukherroub, André Desrochers, Junior A. Tremblay
The migration phenology of many bird species has changed over the past few decades, but whether such changes lead to changes in the nesting phenology remains little known. Studying bird nesting in the boreal forest comes with challenges because of the large size of this biome. We evaluated songbird nesting phenology for the past 25 yrs in a boreal forest in eastern Canada, Forêt Montmorency. We used
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Sharp-tailed Grouse increase site use after prescribed fire but not mechanical treatments during the fall Avian Conserv. Ecol. (IF 1.4) Pub Date : 2024-01-31 Charlotte L. Roy, John Giudice, Lindsey M. Shartell
In the Great Lakes Region, Sharp-tailed Grouse (Tympanuchus phasianellus) use open habitats of grass and brush that require frequent management. Wildlife managers expressed concern that Sharp-tailed Grouse were not responding to management throughout the year, so we examined responses to prescribed fire and mechanical treatment (mowing or shearing) conducted during the fall. We surveyed Sharp-tailed
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Feather isotopes (δ2Hf) and morphometrics reveal population-specific migration patterns of the Blackpoll Warbler (Setophaga striata) Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-11-01 Erica H. Dunn, Kevin J. Kardynal, Kristen M. Covino, Sara R. Morris, Rebecca L. Holberton, Keith A. Hobson
Blackpoll Warblers (Setophaga striata) have declined precipitously according to the North American Breeding Bird Survey, but that survey’s coverage of the boreal breeding range is limited. Migration monitoring offers an attractive tool for additional assessment because migrants from inaccessible portions of the breeding range are included in counts. However, for site-specific trends to be combined
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Seasonal variation in drivers of bird-window collisions on the west coast of British Columbia, Canada Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-11-01 Viviane Zulian, Andrea R. Norris, Kristina L. Cockle, Alison N. Porter, Lauryn G. Do, Krista L. De Groot
We examined the effects of façade-level building and vegetation features on bird-window collision risk, and how these effects varied across seasons at a Pacific coastal campus with mild winters, abundant evergreen vegetation, and seasonally varied bird communities. We searched for bird carcasses at 57 façades of 8 buildings at the University of British Columbia (UBC) over 155 days between January 2015
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Snowy Owls in central North America have regular migration and high philopatry to wintering sites though not always to home ranges Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-11-01 Karen L. Wiebe, Mark T. Bidwell, Rebecca A. McCabe
Understanding the threats faced by a bird species requires a knowledge of their movements throughout the annual cycle and, for migratory species, the degree of connectivity between breeding and wintering sites. We studied the philopatry of Snowy Owls (Bubo scandiacus) tagged in central North America to their wintering sites on the Canadian prairies. The tracking of 16 owls over a period spanning six
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Highly variable movements by Andean Flamingos (Phoenicoparrus andinus): implications for conservation and management Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-11-01 Alex E. Jahn, Joaquín Cereghetti, Michael T. Hallworth, Ellen D. Ketterson, Brandt Ryder, Peter P. Marra, Enrique Derlindati
The Andean Flamingo (Phoenicoparrus andinus) is endemic to the central Andes Mountains, with the majority of the population distributed between Argentina, Bolivia, and Chile. It is the rarest of the six flamingo species on the planet and is one of the least studied flamingos. Little information exists about its annual cycle, including which wetlands individual Andean Flamingos use at different times
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Optimizing survey timing for detecting a declining aerial insectivore, the Black Swift (Cypseloides niger borealis ) Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-10-01 Paul G. Levesque, Richard E. Feldman, Christine A. Rock, W. Eric Gross
Much of the biology of Black Swifts (Cypseloides niger) is poorly known due to the species’ mostly aerial existence and cryptic nesting habitat. Important aspects of the biology of the northern subspecies of Black Swift (C. n. borealis) have been described in the past two decades, but the difficulty in locating and accessing Black Swift breeding sites constrains a range-wide understanding of the species’
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Light-level geolocation reveals moderate levels of migratory connectivity for declining and stable populations of Black-throated Blue Warblers (Setophaga caerulescens) Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-10-01 William B. Lewis, Robert J. Cooper, Michael T. Hallworth, Alicia R. Brunner, T. Scott Sillett
Black-throated blue warbler (Setophaga caerulescens) populations have been declining at the southern edge of the breeding range in North Carolina over the past two decades. Determining the causes of population declines in migratory species requires knowledge of the threats faced throughout the entire annual cycle, necessitating accurate information about the migratory routes and non-breeding areas
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Accounting for misclassification of subspecies provides insights about habitat use and dynamics of the Florida Grasshopper Sparrow in response to fire Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-10-01 Archer F. Larned, Brian W. Rolek, Keota Silaphone, Shane Pruett, Reed Bowman, Bernard Lohr
Monitoring populations is critical to understanding habitat use, especially for endangered species and is important for determining the effectiveness of land management strategies. The Florida Grasshopper Sparrow (Ammodramus savannarum floridanus) is a critically endangered non-migratory grassland bird that has been monitored since the 1990s. It resides primarily in dry prairie habitat managed by frequent
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Vegetation associations of riparian birds in successional woodlands along the regulated Missouri River Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-09-01 Christopher L. Merkord, Amin Rastandeh, Adam Benson, Mark D. Dixon, David L. Swanson
River regulation by dams on the Missouri River has modified riparian forest successional patterns, with decreases in early and increases in later seral stages and higher occurrence of invasive tree species, including Russian olive (Elaeagnus angustifolia) and eastern red cedar (Juniperus virginiana). The effects of these altered successional trajectories on bird biodiversity are difficult to quantify
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Redistribution of wintering American Common Eiders (Somateria mollisima dresseri) Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-09-01 Sarah E. Gutowsky, Gregory J. Robertson, Mark L. Mallory, Nic R. McLellan, Scott G. Gilliland
The American Common Eider (Somateria mollisima dresseri) winters along the eastern coasts of the northern U.S. and southern Canada. Various lines of evidence indicate recent localized changes in eider abundance, particularly in the Gulf of Maine, where the most dramatic oceanic changes in the Northwest Atlantic are also underway. A range-wide overview of shifts in local abundance is needed to understand
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Full-service hotels, convenience stores, or fire escapes? Evaluating the functional role of stopover sites for Neotropical migrants following passage across the Gulf of Mexico in autumn Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-09-01 Lauren E. Solomon, Antonio Celis-Murillo, Michael P. Ward, Jill L. Deppe
Nearctic Neotropical migratory songbirds incur the highest mortality during migration. En-route, songbirds rely on a network of stopover sites to rest, refuel, and/or seek refuge during poor weather. Conservation strategies prioritize protection of sites that best meet these needs. However, the specific function of a stopover site is expected to vary in relation to factors, such as geographic location
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Accurate abundance estimation of cliff-breeding Bounty Island shags using drone-based 2D and 3D photogrammetry Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-09-01 Thomas Mattern, Klemens Pütz, Hannah L. Mattern, David M. Houston, Robin Long, Bianca C. Keys, Jeff W. White, Ursula Ellenberg, Pablo Garcia-Borboroglu
Effective seabird management strategies rely on accurate population estimates, with previous methods typically employing ground counts of a target species. However, difficult and often inaccessible breeding habitats are now able to be explored due to recent technological advancements in Unoccupied Aerial Vehicles (UAVs). This study tested a novel approach by combining high-resolution orthomosaics and
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Spatial segregation between Gray-cheeked Thrush and an introduced nest predator in a managed forest landscape Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-09-01 Jenna P. B. McDermott, Darroch M. Whitaker, Ian G. Warkentin
Introduced species are known for inducing changes in ecosystems and for their impacts on endemic island species. North American red squirrels (Tamiasciurus hudsonicus) were introduced to Newfoundland, Canada, during the 1960s and have been hypothesized as a cause of the precipitous decline of the Newfoundland Gray-cheeked Thrush (Catharus minimus minimus). To test the prediction that the impacts of
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Habitat associations of Golden-winged Warblers and Blue-winged Warblers during the non-breeding season Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-08-01 David I. King, Michael E. Akresh, David A. Murillo, Ruth E. Bennett, Richard B. Chandler
The Golden-winged Warbler (Vermivora chyrsoptera) and Blue-winged Warbler (Vermivora cyanoptera) are both Neotropical migratory species of elevated conservation concern that overlap in distribution on their Central American wintering grounds, yet the extent to which they overlap in terms of habitat use is unknown, potentially hindering conservation efforts. We surveyed these two species along habitat
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Conservation-related knowledge, interactions, and attitudes of local people toward Grey Crowned-Cranes (Balearica regulorum) in Tanzania Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-07-01 Bridget B. Amulike, Curtice R. Griffin, Todd K. Fuller
The endangered Grey Crowned-Crane (Balearica regulorum) occurs extensively in agricultural areas and grasslands outside of protected areas in Tanzania, posing high potential for conflict with people. This study sought to determine the extent of crop depredation by cranes, extent of illegal crane trade, and attitudes towards and interactions of local people with Grey Crowned-Cranes. We interviewed 570
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Post-fledging survival, movement patterns, and habitat associations of Bendire’s Thrashers (Toxostoma bendirei) in the Chihuahuan Desert Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-07-01 Allison Salas, Fitsum Abadi, Martha J. Desmond
Knowledge gaps about the basic demography of a species facing population declines impede conservation efforts. For many passerine species, the survival rate of the post-fledging stage is unknown but may directly contribute to population trajectories. Bendire’s Thrasher (Toxostoma bendirei) exhibits steep population declines in the southwestern United States, yet little is known about the basic breeding
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Effects of Atlantic butterfish (Peprilus triacanthus) in diets of Common Terns (Sterna hirundo): a case study of climate change effects in the Gulf of Maine Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-07-01 Olivia A. Smith, Elizabeth C. Craig
Climate change and associated shifts in marine prey communities can alter food availability for foraging seabirds. This issue is illustrated in the Gulf of Maine by the northward shift of Atlantic butterfish (Peprilus triacanthus; hereafter butterfish) and their subsequent increase in seabird diets. Here, we examine effects of butterfish in diets of the Common Tern (Sterna hirundo), a threatened species
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Evaluating captive-release strategies for the Western Burrowing Owl (Athene cunicularia hypugaea) Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-06-01 Breanna E. Pyott, Lauren M. M. Meads, Alexandra L. M. Froese, Stephen D. Petersen, Aimee M. Mitchell, Albrecht I. Schulte-Hostedde
Quantitatively evaluating and monitoring augmentation efforts are critical for conservation success. We formally evaluated the success of two Western Burrowing Owl (Athene cunicularia hypugaea) population augmentation programs in Manitoba and British Columbia by assessing survival of breeding adults, fledging success, and return rates of fledglings. Manitoba’s head-starting program holds hatching year
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Golden-winged Warbler body fat and blood parasites are associated with anthropogenic and environmental habitat metrics Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-06-01 Chelsea L. Enslow, Rachel Vallender, Nicola Koper
The extent of early successional vegetation communities is declining worldwide. Sometimes species use early successional vegetation communities associated with anthropogenic development (e.g., rangeland, cropland, transportation corridors, aggregate mines), given that, at face value, these ecosystem types can share many of the same characteristics (e.g., lack of mature trees). This may have a negative
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Raptors benefit from biosolids applications on rangelands Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-06-01 Jennifer K. Meineke, Frank I. Doyle, Karen E. Hodges
Globally, many grasslands have been lost or degraded via settlement, conversion to agriculture, or use as pasture. These losses have damaged the ability of migratory and nomadic birds of prey to find suitable breeding territories. Habitat restoration of degraded grasslands via the application of biosolids, the treated and sterilized remains from sewage treatment plants, improves soil water retention
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Three grassland bird species’ responses to fire and habitat structure in southern Illinois, USA suggest broad benefits of grassland size and plant diversity Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-06-01 Alex Glass, Michael Eichholz
Grassland birds are the most rapidly declining bird guild in North America, largely due to extensive habitat loss and fragmentation. Because many grassland bird species have different habitat preferences, managing grasslands to provide habitat for a range of species can be a challenge. We used four years of data from southern Illinois, USA grasslands to estimate the influence of prescribed fire and
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International importance of tidal flats in the Republic of Korea as shorebird stopover sites in the East Asian–Australasian flyway Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-06-01 Ju-Hyun Lee, In-Cheol Kim, Si-Wan Lee, Jong-Ju Son, Jae-Ung Jang, Ha-Cheol Sung
Tidal flats along the southwestern coast of the Republic of Korea are known as internationally important habitats for migratory shorebirds in the East Asian–Australasian Flyway (EAAF). Recent habitat destruction at stopover sites has caused declines in migratory shorebird populations, but the population sizes and habitat use patterns of these species remain poorly understood. We investigated the status
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Evaluating the effects of Natural Resources Conservation Service project implementation on the disturbance-dependent avian community with implications for Blue-winged Warblers Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-06-01 Lincoln R. Oliver, Richard S. Bailey, Kyle R. Aldinger, Petra B. Wood, Christopher M. Lituma
The Blue-winged Warbler (Vermivora cyanoptera) is a songbird that breeds in eastern deciduous forests of North America. The species is declining, partially due to declines in forest disturbances. According to the umbrella species concept, management actions implemented to benefit other critically declining disturbance-dependent species like the Cerulean (Setophaga cerulea) and Golden-winged (Vermivora
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Heightened heart rate but similar flight responses to evolved versus recent predators in an Arctic seabird Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-06-01 Erica A. Geldart, Oliver P. Love, H Grant Gilchrist, Andrew F. Barnas, Christopher M. Harris, Christina A.D Semeniuk
Predator-prey dynamics in the Arctic are being altered with changing sea ice phenology. The increasing frequency of predation on colonial nesting seabirds and their eggs by the polar bear (Ursus maritimus) is a consequence of bears shifting to terrestrial food resources through a shortened seal-hunting season. We examined antipredator responses in a colony of nesting Common Eiders (Somateria mollissima)
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Population trends and effects of local environmental factors on waterbirds at Tanguar Haor freshwater wetland complex in northeast Bangladesh Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-05-01 A B M Sarowar Alam, Sakib Ahmed, Kazi Zenifar Azmiri, Raquibul Amin, Mariëlle Liduine van Toor, Ashis Kumar Datta, Jonas Waldenström, Enam Ul Haque, Sayam U. Chowdhury
Analysis of long-term datasets on bird populations can be used to answer ecological and management questions that are useful for conservation. Tanguar Haor (9500 ha) is one of the major freshwater wetlands in Bangladesh and supports a large number of migratory and resident waterbirds. Because of its unique ecological and economic values, it is arguably the most notable wetland in the floodplains of
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Long-distance dispersal patterns in the Cerulean Warbler: a case study from Indiana Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-05-01 Lara E. Jones, Kamal Islam
Dispersal, defined as movement an individual makes from one breeding population to another, is a process that strongly influences the population dynamics of many animal species. Although dispersal across longer distances is believed to be a relatively uncommon phenomenon for most bird species, movements between populations drive numerous ecological processes, and understanding rates and directions
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High breeding success of the European Starling compared to native species in a recently invaded natural forest of South America Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-04-01 Adrian Jauregui, Paula A. Gerstmayer, Martin A. Colombo, Luciano Noel Segura
Invasive species present numerous threats to ecosystems as they compete with other species for resources and displace them from their habitats. One of the most invasive birds is the European Starling (Sturnus vulgaris), which recently invaded and started to expand throughout South America. Despite its negative impacts on the South American native fauna, there is no information on its breeding success
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Patch-burn grazing provides resources for upland-nesting ducks Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-04-01 Alexander C. Rischette, Cameron A. Duquette, Torre Hovick, Benjamin A. Geaumont
Contemporary rangeland management has expanded from a focus on forage and livestock production to multi-use management practices that include concepts like biodiversity and natural disturbance regimes. Patch-burn grazing (PBG) has been promoted as a multi-use land management practice that can restore vegetation structural heterogeneity and subsequently increase diversity of higher trophic levels, such
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Experts’ opinions on threats to Leach’s Storm-Petrels (Hydrobates leucorhous) across their global range Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-04-01 Ingrid L. Pollet, Ariel K. Lenske, Anne N. M. A. Ausems, Christophe Barbraud, Yuliana Bedolla-Guzmán, Anthony W. J. Bicknell, Mark Bolton, Alexander L. Bond, Karine Delord, Antony W. Diamond, David A. Fifield, Carina Gjerdrum, Luke R. Halpin, Erpur S. Hansen, April Hedd, Rielle Hoeg, Heather L. Major, Robert A. Mauck, Gregory T. W. McClelland, Laura McFarlane Tranquilla, William A. Montevecchi, Mike
Seabirds are declining globally, though the threats they face differ among and within species and populations. Following substantial population declines at several breeding colonies, Leach’s Storm-Petrel (Hydrobates leucorhous) was uplisted from Least Concern to Vulnerable by the International Union for Conservation of Nature (IUCN) in 2016. Reasons for these declines are unclear, and it is important
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Metabarcoding fecal samples to investigate spatiotemporal variation in the diet of the endangered Westland Petrel (Procellaria westlandica) Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-04-01 Marina Querejeta, Marie-Caroline Lefort, Vincent Bretagnolle, Stéphane Boyer
As top predators, seabirds can be indirectly impacted by climate variability and commercial fishing activities through changes in marine communities. However, high mobility and foraging behavior enable seabirds to exploit prey distributed patchily in time and space. Despite this environmental adaptability, seabirds are the world’s most threatened birds and there is, therefore, an urge to acquire information
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Before-and-after evidence that urbanization contributes to the decline of a migratory songbird Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-04-01 Karl T. Heide, Lyle E. Friesen, Virgil E. Martin, Edward D. Cheskey, Michael D. Cadman, D. Ryan Norris
Although urbanization is widely believed to be an increasing threat to biodiversity, drawing strong inferences about its effects on wildlife has been challenging because the state of a population prior to development is rarely known. The Wood Thrush (Hylocichla mustelina) is a steeply declining migratory songbird that breeds in North American temperate deciduous forests and winters in Central America
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Diversity in selection patterns of five grassland songbirds in dry-mixed grasslands of Alberta Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-04-01 Julie P. N. Landry-DeBoer, Paul F. Jones, Brad A. Downey, Phillip K. Rose, Katheryn Taylor, Mike S. Verhage, Amanda M. MacDonald, Adam J. Moltzahn
Declining grassland bird populations across North America continue to be a concern. Understanding local relationships between grassland bird abundance and vegetative and landscape characteristics will enable more prescriptive recommendations to be made to land managers. We used point count survey data collected by the MULTISAR (Multiple Species At Risk) program along with field measurements of habitat
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The growth rate of Black-tailed Gull chicks is negatively related to total mercury of female parents on Kabushima (Kabu Island), Japan Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-04-01 Tani Hinako, Masaki Shirai, Yuichi Mizutani, Yasuaki Niizuma
The mercury (Hg) contamination at high concentrations affects the physiological state and behavior of animals, however, the effects of low Hg exposure on avian breeding success and the impact on the growth of chicks that depend on feeding from their parents are unclear. We investigated the effects of maternal Hg concentrations on breeding success in a colony of Black-tailed Gulls (Larus crassirostris)
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Weak support for cumulative effects of industrial disturbance on three owl species in Alberta’s boreal forest Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-03-01 Julia Shonfield, Erin M. Bayne
Human-caused disturbances are encroaching on natural areas and quantifying the relative effects of different types of disturbance, and whether they interact on a landscape to create additive or synergistic cumulative effects, will provide a better understanding of how wildlife are affected. We evaluated potential cumulative effects of industrial disturbance on habitat use of Barred Owls (Strix varia)
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Natal origins of Mallards harvested in the Atlantic Flyway of North America: implications for conservation and management Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-03-01 Samuel R. Kucia, Michael L. Schummer, Jackson W. Kusack, Keith A. Hobson, Chris A. Nicolai
Appropriate management and conservation of migratory species requires knowledge of connectivity between natal or breeding sites and stopover or wintering sites. For game species, such as waterfowl, knowledge of source areas that produce juveniles, which are available for harvest in the autumn-winter, is of considerable interest. External markers have long been used in mark-recapture studies to identify
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Combining community science and MaxEnt modeling to estimate Wild Turkey (Meleagris gallopavo) winter abundance and distribution Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-03-01 Jennifer E. Baici, Jeff Bowman
Understanding the distribution and abundance of species is a fundamental aspect of conservation biology. Species distribution models aim to predict distributions based on species observations and ecologically relevant information. To understand the contemporary distribution of Wild Turkeys (Meleagris gallopavo) in Ontario, we curated and collated Wild Turkey flock observations from eBird and iNaturalist
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Survival of Common Loon chicks appears unaffected by Bald Eagle recovery in northern Minnesota Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-03-01 Jennyffer Cruz, Steve Windels, Wayne E. Thogmartin, Shawn M. Crimmins, Benjamin Zuckerberg
Recovering species are not returning to the same environments or communities from which they disappeared. Conservation researchers and practitioners are thus faced with additional challenges in ensuring species resilience in these rapidly changing ecosystems. Assessing the resilience of species in these novel systems can still be guided by species’ ecology, including knowledge of their population size
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Comparative use of artificial structures and natural vegetation by birds in a built-up urban area in Ghana Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-03-01 Joseph Afrifa, Justus Deikumah, Kweku Monney
Our understanding of how birds use human supplementary resources, especially artificial structures and patchy vegetation within urban areas, is limited. Our study compared the use of artificial structures versus natural vegetation by birds in built-up areas in the Cape Coast Metropolitan Assembly (CCMA) in the central region of Ghana. Using point count technique, we recorded bird species and the activities
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Quantifying gull predation in a declining Leach’s Storm-petrel (Hydrobates leucorhous) colony Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-02-01 Alexander Bond, Sabina Wilhelm, Donald Pirie-Hay, Gregory Robertson, Ingrid Pollet, Jillian Arany
The effect of gull predation on sympatric seabirds has garnered much attention and management action in recent decades. In Witless Bay, Newfoundland, Canada, gulls depredate significant numbers of Leach’s Storm-petrels (Hydrobates leucorhous) annually. We quantified this predation on Gull Island in Witless Bay, and its effects on the storm-petrel population, by estimating the annual gull predation
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Does human disturbance affect physiological traits of Two-banded Plovers nesting on an urban beach? Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-02-01 Glenda Hevia, Marcelo Bertellotti, Daniel Gibson, Verónica D'Amico
In coastal Patagonia, Argentina, shorebird breeding habitats overlap with high levels of human recreational activities, such as dog-walking and driving motorized vehicles. We assessed physiological traits related to body condition, nutritional metabolites, cellular immunity, and stress responses of adult Two-banded Plovers (Charadrius falklandicus) in northern Chubut, Patagonia, Argentina. We examined
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Evidence of historical pairing between two cryptic species of Short-tailed Albatross Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-02-01 Masaki Eda, Hiroe Izumi, Satoshi Konno, Miwa Konno, Yuki Watanabe, Fumio Sato
When secondary contact occurs between allopatric sister species, several evolutionary consequences are expected, such as reinforcement of reproductive isolation, hybrid speciation, de-speciation, introgressive hybridization, or formation of a stable hybrid zone. The Short-tailed Albatross (Phoebastria albatrus) is a vulnerable seabird that breeds mainly in Torishima, the Izu Islands, and two islets
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Using Breeding Bird Survey and eBird data to improve marsh bird monitoring abundance indices and trends Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-02-01 Kristin Bianchini, Douglas Tozer
The elusive nature of many marsh-breeding birds presents a challenge for effective population monitoring. The Great Lakes Marsh Monitoring Program (GLMMP), delivered by Birds Canada, addressed these challenges by concentrating survey efforts in marsh bird habitats and by using survey protocols aimed at maximizing marsh bird detections. GLMMP data suggest that numerous marsh bird species are declining
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On the lack of scientific evidence for the Ontario cormorant cull and other cormorant management actions: a response to Dorr et al. (2022) Avian Conserv. Ecol. (IF 1.4) Pub Date : 2023-02-01 James Ludwig, Steven Cooke, Keith Hobson
Essay In their recent essay in Avian Conservation and Ecology, Dorr et al. (2022) were compelled to clear up apparent misunderstandings they felt were perpetrated by the separate editorials of Hobson (2021) and Cooke (2021) dealing specifically with the Ontario government’s decision to allow a province-wide public cull of Double-crested Cormorants (Nannopterum auritum) in response […]
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Long-term monitoring of breeding successes of Great Hornbill (Buceros bicornis) and Rhinoceros Hornbill (Buceros rhinoceros) using artificial nest boxes in Budo-Su-Ngai Padi National Park, Thailand Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-12-26 Chakorn Pasuwan, Preeda Thiensongrusamee, Nureehan Da-U- Re, Sukanya Chaisuriyanun, Siriwan Nakkuntod, Pilai Poonswad, Samuding Hayeburaheng
Nest boxes are a conservation tool for increasing the availability of nests. The efficacy of nest boxes can be assessed by examining the breeding parameters of birds in nest boxes to see whether data are comparable with tree cavities. The hornbill artificial nest research was conducted in Budo-Su-Ngai Padi National Park, Thailand since 2003. This project aims to increase the breeding propensity of
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Drought disrupts year-round breeding readiness in a tropical songbird Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-12-26 Jordan Boersma, Erik Enbody, Jordan Karubian, Heather Watts, Hubert Schwabl
Climate change is expected to increase the prevalence and severity of extreme weather events like drought. For many opportunistically breeding tropical bird species, precipitation serves as a primary cue for onset of breeding, and sustained drought can have major impacts on reproductive fitness. The physiological effects of drought are poorly understood, but understanding physiological responses can
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Arthropod prey and diets of woodland migrants are similar between natural riparian woodlands and anthropogenic woodlots in the northern prairie region Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-12-26 Ming Liu, Patrick Kinnicutt, Reza Goljani Amirkhiz, David Swanson
Migration is an energetically expensive activity with important links to population dynamics of migratory birds. Identification of high-quality stopover habitat to support migratory refueling is, therefore, important for woodland migrant conservation. Woodland habitat is scarce in the northern prairie region, consisting of natural riparian corridor woodlands (corridors) and anthropogenic woodlots (woodlots)
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Migrants employ mixed strategies to route across the Great Lakes basin Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-12-26 Michael Wells, Elizabeth Rigby, Kevin Heist, Nathan Rathbun
Millions of migrants encounter the Great Lakes during spring and autumn migratory movements. How migrants behave when encountering these lakes is relatively unknown at the local and basin scales. Using seven years of radar data from 33 sites along the Great Lakes coastline, we investigated three hypotheses on migrant behavior during crepuscular and nocturnal movements. First, we hypothesized migrants’
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Fall bird migration in western North America during a period of heightened wildfire activity Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-12-26 Kyle Kittelberger, Megan Miller, Çağan Şekercioğlu
Billions of birds annually migrate between breeding and nonbreeding grounds in North America. During fall 2020, there was a series of alarming mass-mortality events of migratory birds across the western United States, with estimates of 100,000 to 1 million birds having perished. One potential culprit behind these die-offs is wildfires, though there has been little research documenting the indirect
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A comparison of historical and contemporary reproductive traits in a declining population of Glaucous-winged Gulls (Larus glaucescens) Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-11-26 Louise Blight, William O'Shea, Gregory McClelland
Understanding how organisms manage life history trade-offs under variable environmental conditions is an aim that is central to ecology. Comparing modern reproductive data with those from historical studies can increase understanding of the range of historical conditions that have acted on a given species over time. We use recent (2008-2010) and historical (1960s-1980s) reproductive data from a single
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Imperiled sparrows can exhibit high nest survival despite atypical nest site selection in urban saltmarshes Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-11-26 Alison Kocek, Chris Elphick, Thomas Hodgman, Adrienne Kovach, Brian Olsen, Katharine Ruskin, W. Gregory Shriver, Jonathan Cohen
Understanding habitat selection and its fitness consequences in remnant populations of birds in fragmented and urbanized habitat may provide guidance to land managers for imperiled species conservation. We studied Saltmarsh Sparrow, Ammospiza caudacuta, and Seaside Sparrow, A. maritima, nest site selection and nest survival at five sites in New York City (NYC) and one site on western Long Island, New
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Dynamics of pre-breeding nutrient reserves in subarctic staging Lesser Snow Geese (Anser caerulescens caerulescens) and Ross’s Geese (Anser rossii): implications for reproduction Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-11-26 Frank Baldwin, Ray Alisauskas, James Leafloor
Phenological mismatch occurs when the timing of reproductive events and seasonal availability of resources become decoupled, and is increasing in migratory birds in response to climate change. Arctic-nesting geese acquire important nutrient reserves at spring-staging areas, but advancing springs, combined with large population increases and long-term goose-mediated habitat alteration, could induce
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Using tracking technology to locate endangered ʻuaʻu or Hawaiian Petrel (Pterodroma sandwichensis) burrows Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-11-26 Andre Raine, Alex Wang, Bret Mossman, Scott Driskill
The ʻuaʻu, or Hawaiian Petrel, Pterodroma sandwichensis, is an endangered seabird endemic to the Hawaiian Islands. Although its distribution on some of the islands is well documented, on larger islands such as Hawaiʻi there are significant distribution gaps. Previous work within the Puʻu O ʻUmi Natural Area Reserve (NAR) on Hawaiʻi strongly suggested that a breeding colony of the species was present
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Estimation of the reference lead (Pb) concentration levels affecting immune cells in the blood of Black-headed Gulls (Chroicocephalus ridibundus, Laridae) Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-11-26 Nana Ushine, Osamu Kurata, Yoshikazu Tanaka, Shouta Nakayama, Mayumi Ishizuka, Takuya Kato, Shin-Ichi Hayama
The biological effects of lead (Pb) contamination have been reported in various species. There are no restrictions on the use of Pb products, including bullets, in the areas south of Hokkaido, Japan. Local governments have announced the presence of Pb in the soil sediments of water bodies. Previous studies have confirmed the relationship between blood Pb level (BLL) and immune cells. This study was
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Whooping Crane (Grus americana) use patterns in relation to an ecotope classification in the Central Platte River Valley, Nebraska, USA Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-11-26 David Baasch, Andrew Caven, Joel Jorgensen, Roger Grosse, Matt Rabbe, Dana Varner, Ted LaGrange
A portion of the Aransas-Wood Buffalo population of Whooping Cranes (Grus americana) stopover within the Central Platte River Valley (CPRV) annually. Past studies have found Whooping Cranes select herbaceous wetlands over agricultural fields when evaluated at a migration-corridor scale. However, recent studies conducted within the CPRV have reported Whooping Cranes selected agricultural fields and
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Snag density and stand age, but not stand size, explain occupancy and reproduction of an imperiled cavity nester in early successional forest Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-11-26 Meghan Beatty, Karl Miller, Jr. Robert Fletcher
Many early successional and disturbance-dependent bird species have declined over the past several decades. Cavity-nesting birds in early successional forests are vulnerable because they often require specific habitat characteristics and frequent disturbance events. We examined whether stand age (a proxy for forest succession), stand size, and snag density explained occupancy, nest survival, and productivity
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Stairway to extinction? Influence of anthropogenic climate change on distribution patterns of montane Strigiformes in Mesoamerica Avian Conserv. Ecol. (IF 1.4) Pub Date : 2022-11-26 Reinhard Matadamas, Paula Enríquez, Lázaro Guevara, Adolfo Navarro-Sigüenza
Although anthropogenic climate change (ACC) is a global phenomenon affecting all ecosystems, its effects are especially relevant in certain ecosystems, such as tropical montane forests. Responses of montane species to ACC in Mesoamerica remain unclear, limiting our ability to assess their vulnerability and the impacts on these ecosystems overall. To understand mechanisms underlying the distribution