-
Timing of upland vegetation management affects breeding of three species of passerine birds: a case study from southwest England Bird Study (IF 0.7) Pub Date : 2024-02-23 Sara Zonneveld, Mark Lawrence, Mark Penney, Dave Scott, John Walters, Charles R. Tyler
Current permitted timings of vegetation burning and Bracken Pteridium aquilinum control show considerable overlap with the timing of breeding of three widespread UK upland breeding passerine bird s...
-
Red-necked Falcons Falco chicquera track changing environments by shifting their trophic niche during the rainy monsoon season Bird Study (IF 0.7) Pub Date : 2024-02-21 Mohammod Foysal, Connor T. Panter
Red-necked Falcons Falco chicquera shift their trophic niche, from eating birds to bats, during the rainy monsoon season.To explore seasonal changes in prey weight, diet composition, and mobbing in...
-
Diet of the European Shag Gulosus aristotelis during the non-breeding season at a roost within a tidal channel Bird Study (IF 0.7) Pub Date : 2024-02-21 Natalie Isaksson, Shaun Fraser, Jonathan D. R. Houghton, Benjamin J. Williamson, Jared Wilson, Elizabeth A. Masden
The diet of the European Shag Gulosus aristotelis was assessed at one of their most northerly roosts in the UK; Bluemull Sound, Shetland. One pellet and 40 faecal samples were collected during the ...
-
Nest defence of urban and rural Common Kestrels Falco tinnunculus against different predators Bird Study (IF 0.7) Pub Date : 2024-02-21 K. Bavoľárová, M. Uhrin, J. Riegert
Common Kestrels Falco tinnunculus breeding in a rural environment reacted more aggressively to dummies of potential predators than did those breeding in an urban environment. During the nestling ph...
-
Challenges in quantifying the responses of Black-legged Kittiwakes Rissa tridactyla to habitat variables and local stressors due to individual variation Bird Study (IF 0.7) Pub Date : 2024-02-21 N. J. O’Hanlon, C. B. Thaxter, G. D. Clewley, J. G. Davies, E. M. Humphreys, P. I. Miller, C. J. Pollock, J. Shamoun-Baranes, E. Weston, A. S. C. P. Cook
Strong individual variation was observed in the responses of Black-legged Kittiwakes Rissa tridactyla to environmental covariates related to foraging behaviour and habitat selection, and in the ove...
-
Migration patterns of breeding Hen Harriers Circus cyaneus in Spain Bird Study (IF 0.7) Pub Date : 2024-01-26 Sara Morollón, Jorge García-Macía, Alejandro Onrubia, Simon Lee, Vicente Urios
Tracked Hen Harriers Circus cyaneus breeding in Spain winter either in the southern parts of the Iberian Peninsula or in Morocco, although migration timing and distances did not differ between bird...
-
The influence of time-of-day on estimates of taxonomic versus functional diversity in avian communities Bird Study (IF 0.7) Pub Date : 2024-01-04 Oleksii Dubovyk, Eric L. Walters
Avian communities composed of a total of 79 species were sampled repeatedly at different times of day throughout the breeding season in Norfolk, Virginia, USA. Estimates of taxonomic diversity (spe...
-
Migration patterns and breeding areas of Green Sandpipers Tringa ochropus wintering in southern Britain Bird Study (IF 0.7) Pub Date : 2024-01-04 Ken W. Smith, Barry E. Trevis, Mike Reed
Green Sandpipers Tringa ochropus wintering in southern Britain breed in western Scandinavia, from southern Norway to Finland. They leave Britain in late April and return by the end of June/early Ju...
-
Nest attendance of the Kentish Plover Charadrius alexandrinus in relation to temperature and incubation stage Bird Study (IF 0.7) Pub Date : 2023-12-18 Isabel Hunter, Kevin Kuhlmann Clausen, Thomas Bregnballe
Nest attendance of Kentish Plovers Charadrius alexandrinus at an undisturbed site increased from approximately 70% in the initial days of incubation to 90–95% after day 10. During the day, nest att...
-
Identifying targets for conservation: the arrival and loss of Common Eider Somateria mollissima ducklings in an estuarine nursery Bird Study (IF 0.7) Pub Date : 2023-12-11 Hilary Brooker-Carey, Chris P.F. Redfern, Paul G. Morrison
The arrival of Common Eider Somateria mollissima ducklings into a reception and nursery area is a measure of breeding success and phenology but reveals gaps in knowledge for effective conservation....
-
Further declines of the Western Capercaillie Tetrao urogallus in Scotland as shown by the 2021–2022 winter survey Bird Study (IF 0.7) Pub Date : 2023-12-11 Nicholas I. Wilkinson, Molly Doubleday, Andrew Douse, Andy Ford, Leah A. Kelly, Kenny Kortland, Juli Titherington, Simon R. Wotton, Steven R. Ewing
The estimated number of Western Capercaillies Tetrao urogallus in Scotland in winter 2021–2022 was 532 with a 95% confidence interval (CI) of 227–810.To produce an updated estimate of the number of...
-
A preliminary study of the winter roosting behaviour of four woodland passerines Bird Study (IF 0.7) Pub Date : 2023-11-24 M. J. O’Connell, F. I. Squirrell, M. Greening
Radio-tracking of four woodland passerine species reveals variation in winter roost site selection within and between species.To evaluate methods for studying winter roosting behaviour in woodland ...
-
Wintering Great White Egrets Ardea alba in a riverine area in the Netherlands: numbers, abundance and timing Bird Study (IF 0.7) Pub Date : 2023-11-24 Rob Lensink, Paul van Els
The riverine area in the Netherlands is an important wintering area for Great White Egrets Ardea alba. Numbers decline in relation to very cold weather, and increase in relation to peaks in populat...
-
The status of breeding Red-throated Divers Gavia stellata and Black-throated Divers Gavia arctica in Kintyre, Scotland, 2016–2020 Bird Study (IF 0.7) Pub Date : 2023-11-24 Rafe Dewar, Simon Lawrence
An onshore wind farm monitoring programme carried out across Kintyre, Scotland from 2016 to 2020 provided an insight into the status of the area’s breeding Red-throated Diver Gavia stellata and Bla...
-
Traditional landscape elements are key to the threatened Ortolan Bunting Emberiza hortulana in its Italian stronghold Bird Study (IF 0.7) Pub Date : 2023-11-24 Vincenzo Alfano, Marco Gustin, Mattia Brambilla
Cultural landscapes with Tamarisk Tamarix gallica rows, marginal habitats and crop heterogeneity promote the occurrence of Ortolan Buntings Emberiza hortulana in the Marche region, a key area for t...
-
The status of the UK breeding European Turtle Dove Streptopelia turtur population in 2021 Bird Study (IF 0.7) Pub Date : 2023-11-24 Andrew J. Stanbury, Dawn E. Balmer, Mark A. Eaton, Philip V. Grice, Nicole Z. Khan, Murray J. Orchard, Simon R. Wotton
The first UK European Turtle Dove Streptopelia turtur survey, in 2021, estimated the breeding population at 2092 territories.Changes in European Turtle Dove abundance in the UK have been monitored ...
-
Habitat selection of breeding Wood Sandpipers Tringa glareola in Scotland Bird Study (IF 0.7) Pub Date : 2023-11-24 Bozena Kalejta-Summers
The European breeding population of the Wood Sandpiper Tringa glareola is estimated to be stable, but the species has declined in several countries. Describing breeding habitat requirements is impo...
-
Declining territory occupancy and productivity in a Welsh Red-billed Chough Pyrrhocorax pyrrhocorax population Bird Study (IF 0.7) Pub Date : 2023-11-24 A. V. Cross, A. Stratford, I. Johnstone, P. J. Lindley
Much of the UK’s largest population of Red-billed Chough Pyrrhocorax pyrrhocorax shows long-term decline in territory occupancy and productivity. Underlying mechanisms need urgent study to improve ...
-
Habitat and other environmental correlates of the decline of breeding Whinchats Saxicola rubetra in the UK since the mid-1990s Bird Study (IF 0.7) Pub Date : 2023-11-24 Andrew J. Stanbury, Robert W. Hawkes, Emma L. Teuten, Irena Tománková, David J.T. Douglas
Declines in Whinchat Saxicola rubetra breeding abundance in the UK vary with habitat and other environmental conditions.To test for associations between changes in Whinchat abundance between 1994 a...
-
Wintering and migration strategies of Slavonian Grebes Podiceps auritus breeding in Iceland Bird Study (IF 0.7) Pub Date : 2023-11-24 Thorkell Lindberg Thórarinsson, Benjamin Merkel, Adalsteinn Orn Snaethórsson, Yann Kolbeinsson
Slavonian Grebes Podiceps auritus breeding in Iceland moult on freshwater, before migrating to the seas around the British Isles for the winter.The aims were to describe the migration strategies an...
-
Human-facilitated feeding on Date Palm Phoenix dactylifera sap by trans-Saharan warblers during spring stopover in a Tunisian oasis Bird Study (IF 0.7) Pub Date : 2023-11-24 Fatma Belani, José Javier Cuervo, Slaheddine Selmi
Some trans-Saharan warbler species feed on human-extracted Date Palm Phoenix dactylifera sap during spring migratory stopover.To investigate the behaviour of birds feeding on Date Palm sap at a Tun...
-
Analysis of the trans-Saharan migration and wintering areas of GPS-tagged Cinereous Vultures Aegypius monachus Bird Study (IF 0.7) Pub Date : 2023-11-24 Jorge García-Macía, Marc Gálvez, Gerard Plana, Núria Vallverdú, Ernesto Álvarez, Manuel Galán, Juan José Iglesias-Lebrija, Vicente Urios
Although the western Mediterranean population of the Cinereous Vulture Aegypius monachus is considered to be mainly resident, a small but increasing number of individuals migrate between western Eu...
-
The impact of forest characteristics, and bird and insect diversity on the occurrence of the Great Spotted Woodpecker Dendrocopos major and Grey-headed Woodpecker Picus canus in South Korea Bird Study (IF 0.7) Pub Date : 2023-08-24 Sang-Yeon Lee, Junseok Lee, Ha-Cheol Sung
Although the Great Spotted Woodpecker Dendrocopos major and Grey-headed Woodpecker Picus canus have overlapping ranges in South Korea, they occur in areas with different forest structures and the o...
-
Identification of the Greater Spotted Eagle Clanga clanga, Lesser Spotted Eagle Clanga pomarina and interspecific hybrids using the morphology of shed flight feathers Bird Study (IF 0.7) Pub Date : 2023-08-24 Freddy Rohtla, Ülo Väli
Shed feathers can be used for the field identification of the Greater Spotted Eagle Clanga clanga and Lesser Spotted Eagle Clanga pomarina, but identification of hybrids is problematic.To provide a...
-
Assessment of the consumption of the exotic Asian Hornet Vespa velutina by the European Honey Buzzard Pernis apivorus in southwestern Europe Bird Study (IF 0.7) Pub Date : 2023-08-22 Salvador Rebollo, Luisa M. Díaz-Aranda, Jorge A. Martín-Ávila, María Hernández-García, Marina López-Rodríguez, Navila Monteagudo, José M. Fernández-Pereira
The Asian Hornet Vespa velutina was the second most important species in the diet of the European Honey Buzzard Pernis apivorus in southwestern Europe, just four years after the appearance of the e...
-
Age demographics of a non-breeding Eurasian Woodcock Scolopax rusticola population in relation to environmental factors Bird Study (IF 0.7) Pub Date : 2023-08-22 Nerea Prieto, Javier Rodríguez-Pérez, Ibon Telletxea, Ruben Ibañez, Fermin Ansorregi, Aitor Galdos, Aitzol Urruzola, Ixtoan Iriarte, Juan Arizaga
Environmental conditions in non-breeding areas cause differential winter distribution patterns between age classes in a Eurasian Woodcock Scolopax rusticola population wintering in northern Iberia....
-
The eyes have it: the response of European Herring Gulls Larus argentatus to human eye-gaze Bird Study (IF 0.7) Pub Date : 2023-08-15 Lewis M. Lamond, David N. Fisher
Using a novel method for testing the effect of gaze direction on flight initiation distances of European Herring Gulls Larus argentatus, we found that distances were significantly shorter for an av...
-
Impact of wildfires on ecosystems and bird communities on designated areas of blanket bog and heath Bird Study (IF 0.7) Pub Date : 2023-08-15 Neil Reid, Ruth Kelly, W. Ian Montgomery
Wildfires on moorland reduced bird species richness and abundance, along with the seedbank and abundance of ground beetles and spiders. The effects were detectable three years after the fires took ...
-
Morphometric versus genetic variation in the Eurasian Reed Warbler Acrocephalus scirpaceus in Italy Bird Study (IF 0.7) Pub Date : 2023-08-10 Renzo Ientile, Marcello Tagliavia, Natalino Cuti, Rosa Termine, Carlo Giannella, Sergio Nissardi, Carla Zucca, Vincenzo Cavaliere, Gabriella Lo Verde, Daniela Campobello, Bruno Massa
The Eurasian Reed Warbler Acrocephalus scirpaceus from breeding sites in Italy has little genetic variability in the mitochondrial cytochrome b gene but shows morphological variation suggesting iso...
-
The relationship between Mute Swan Cygnus olor population trends in Great Britain and environmental change Bird Study (IF 0.7) Pub Date : 2023-08-10 Tiffany L.T. Ki, Deborah J. Pain, Jennifer A. Gill, Rhys E. Green
The increase in autumn sowing of crops is probably an additional contributory factor to the national ban on lead angling weights in influencing the large increase in British Mute Swan Cygnus olor n...
-
A new global review of bird atlases and their contribution to knowledge Bird Study (IF 0.7) Pub Date : 2023-08-10 P. Christy Pototsky, Will Cresswell
Over 600 bird atlases projects have been implemented across 93 countries, with at least 380,000 participants. Bird atlases with larger geographical scope had greater research impact but those utili...
-
Common Terns Sterna hirundo and Roseate Terns Sterna dougallii frequently rest on the sea surface in winter quarters and during migration Bird Study (IF 0.7) Pub Date : 2023-07-27 Stephen A. Oswald, Ian C. T. Nisbet, Carolyn S. Mostello
Common Terns Sterna hirundo and Roseate Terns S. dougallii rarely rest on the sea surface during the breeding season but frequently do so in winter and on migration.To investigate the behaviour of ...
-
First record of interspecific cooperative breeding among redstart species Bird Study (IF 0.7) Pub Date : 2023-07-12 Giacomo Bruni, Emiliano Mori, Rosario Balestrieri
We report the first record of a single nest containing the young of a pair of Black Redstarts Phoenicurus ochruros and a pair of Common Redstarts Phoenicurus phoenicurus. All four parents provision...
-
A first insight into the post-breeding dispersal strategies of adult Lesser Kestrels Falco naumanni in Italy Bird Study (IF 0.7) Pub Date : 2023-04-11 Alessandro Ferrarini, Giuseppe Giglio, Stefania Caterina Pellegrino, Marco Gustin
ABSTRACT Capsule After breeding, Lesser Kestrels Falco naumanni do not migrate directly to Africa but exhibit a post-breeding dispersal that lasts several weeks. Tracking of four adult individuals provides the first data on distances and direction of travel, and suggests sex differences in post-breeding dispersal. Aims We aimed to: (a) detect the dispersal routes and stopover sites used by adult Lesser
-
Daily, seasonal, and annual variation in area use of Lesser Black-backed Gulls Larus fuscus related to offshore renewable developments Bird Study (IF 0.7) Pub Date : 2023-04-06 Gary D. Clewley, Chris B. Thaxter, Emily S. Scragg, Elizabeth A. Masden, Lee J. Barber, Greg J. Conway, Nigel A. Clark, Niall H.K. Burton
ABSTRACT Capsule Individually tracked Lesser Black-backed Gulls Larus fuscus rarely visited offshore areas in this study but showed high variation across multiple time scales in overall area use. Aims To quantify the variation in space use by Lesser Black-backed Gulls, a species of conservation concern, from short- and long-term data on tracked individuals, and to assess the time spent offshore and
-
Home range of a long-distance migrant, the Greenland Barnacle Goose Branta leucopsis, throughout the annual cycle Bird Study (IF 0.7) Pub Date : 2023-04-03 Susan Doyle, David Cabot, Larry Griffin, Adam Kane, Kendrew Colhoun, Courtney Redmond, Alyn Walsh, Barry J. McMahon
ABSTRACT Capsule Home range area and foraging distance of the Greenland Barnacle Goose Branta leucopsis, a long-distance migrant were calculated and activity patterns were described. Aims To understand the use of space by Barnacle Geese throughout the annual cycle, and to inform effective wildlife management and conservation planning. Methods Tracking data from 29 annual cycles from 18 individual Barnacle
-
Influence of nest box design and nesting material on ectoparasite load for four woodland passerines Bird Study (IF 0.7) Pub Date : 2023-04-03 Thomas Blunsden, Anne E. Goodenough
ABSTRACT Capsule Abundance of haematophagous ectoparasites in woodland passerine nests is influenced by complex interactions between nest box design, bird species, amount of nesting material and nest composition. Aims To analyse ectoparasite abundance relative to nest box design (old wooden nest boxes present for over 2 years versus new wooden nest boxes of the same dimensions vs deep wooden nest boxes
-
Dead Sea level decline pushed a sensitive ecosystem out of equilibrium, causing the relocation of a colonial bird breeding site Bird Study (IF 0.7) Pub Date : 2023-04-03 Ron Haran, David Troupin, Ido Izhaki
ABSTRACT Capsule Dead Sea Sparrows Passer moabiticus transferred their historical breeding colony location, following geo-ecological and hydrological changes, to a new, less arid zone within a nature reserve. Aims To find biotic and abiotic factors affecting the choice of nest sites by Dead Sea Sparrows, in order to locate potential breeding areas and plan in advance for their protection. Methods Mapping
-
Age-specific survival in an English Twite Linaria flavirostris population Bird Study (IF 0.7) Pub Date : 2023-02-27 Ismini Gkourtsouli-Antoniadou, Steven R. Ewing, George Hudson, Michael A. Pearson, Julia Schroeder, Peter E. Welch, Nicholas I. Wilkinson, Jamie Dunning
ABSTRACT Low juvenile survival may be one driver underpinning recent declines in one of England’s remnant breeding Twite Linaria flavirostris populations, but declines are more likely driven by factors affecting all age groups.
-
Gull-human interactions in an urban population of Herring Gulls Larus argentatus and Lesser Black-backed Gulls Larus fuscus Bird Study (IF 0.7) Pub Date : 2023-02-27 Emily R. Beasley, Thomas E. Dickins
ABSTRACT Herring Gulls Larus argentatus and Lesser Black-backed Gulls Larus fuscus were involved in more nuisance events with humans as the breeding season progressed, although human provisioning was negatively associated with gull nuisance events.
-
Predation by the Common Kingfisher Alcedo atthis of non-native fish species during the winter Bird Study (IF 0.7) Pub Date : 2023-01-11 José Antonio García, M. Ángeles Hernández, Luisa Nunes, Luis Fernando Sánchez-Sastre, Patricia Casanueva, Francisco Campos
ABSTRACT Capsule The winter diet of Common Kingfishers Alcedo atthis using two rivers in central Spain was 94.9% fish, all of which were non-native species. Aims To determine the composition Common Kingfisher diet in an area recently colonized by non-native fish species, and to compare estimated prey size during the winter to that of fish fed to nestlings during the breeding season. Methods The diet
-
Factors associated with Herring Gulls Larus argentatus stealing food from humans in coastal towns Bird Study (IF 0.7) Pub Date : 2023-01-09 Shubhi Raghav, Neeltje J. Boogert
ABSTRACT Food stealing from humans by Herring Gulls Larus argentatus increased with human food availability but was not associated with any food preferences. Gulls obtained significantly more food when stealing than when scrounging, and the response of most people was neutral, suggesting that food stealing is a low-risk, high-reward strategy for urban Herring Gulls.
-
Nesting associations and breeding output of Barn Owls Tyto alba and Red-billed Choughs Pyrrhocorax pyrrhocorax sharing nest boxes Bird Study (IF 0.7) Pub Date : 2023-01-09 Diego Villanúa, Juan Arizaga, Alberto Artázcoz, Daniel Alonso, Alberto Lizarraga, Juan M. Barbarin, Guillermo Blanco
ABSTRACT Capsule Barn Owls Tyto alba and Red-billed Choughs Pyrrhocorax pyrrhocorax show differential breeding outputs as a consequence of sharing nest boxes. Aims To describe for the first time a commensal relationship between the Red-billed Chough and the Barn Owl during the breeding period. Methods During systematic monitoring of 90 nest boxes installed for Barn Owls in Navarre, northern Spain,
-
The predation of hatching Red-legged Partridges Alectoris rufa by the harvester ant Messor barbarus Bird Study (IF 0.7) Pub Date : 2023-01-09 Fabián Casas, Alberto Tinaut
ABSTRACT We report, for the first time, two cases of predation on Red-legged Partridge Alectoris rufa chicks in the process of hatching by the harvester ant Messor barbarus.
-
Declines in invertebrates and birds – could they be linked by climate change? Bird Study (IF 0.7) Pub Date : 2023-01-09 James W. Pearce-Higgins, Roger K. A. Morris
ABSTRACT Capsule Through case studies that link changes in invertebrate populations to changes in bird populations, we suggest how climate change may increasingly impact bird populations through variation in their invertebrate prey. Aims To assess whether invertebrate and bird population declines could be linked and suggest potentially emerging climate change impacts on wildlife. Methods We draw on
-
Habitat-specific diversity in Central European birds Bird Study (IF 0.7) Pub Date : 2023-01-04 Jiří Reif, Zdeněk Vermouzek, Petr Voříšek, Dušan Romportl, Javier Rivas-Salvador, Federico Morelli
ABSTRACT Capsule Bird species richness was highest in forest and urban habitat types, lower in grassland and wetland, and lowest in cropland. Aims To investigate bird species richness patterns across different habitat types in Czechia, Central Europe. Methods Data from a national breeding bird monitoring scheme in Czechia, based on mapping of positions of individual birds along transects, were used
-
A new foraging, post-breeding, and wintering site for the Mediterranean subspecies of the European Storm Petrel Hydrobates pelagicus melitensis in the Aegean Sea off Turkey Bird Study (IF 0.7) Pub Date : 2023-01-04 Ortaç Onmuş, Turgut Ege, Emin Yoğurtçuoğlu, Soner Bekir, Süleyman Ekşioğlu
ABSTRACT The Mediterranean subspecies of the European Storm Petrel Hydrobates pelagicus melitensis is suspected to be resident in the Aegean Sea off Turkey, but breeding is yet to be confirmed. Additionally, the area is used during the non-breeding season by individuals from elsewhere in the Mediterranean, and population sizes of over a thousand individuals have been recorded, especially in the central-south
-
Intra- and inter-annual variation in body mass of two species of weavers in an Afrotropical environment Bird Study (IF 0.7) Pub Date : 2022-12-12 Akpanta J. Ishong, Taiwo C. Omotoriogun
ABSTRACT Capsule We describe the effects of sex, daily rainfall and temperature, seasonality, and breeding stage on body mass variation in two species of weaver in a tropical African environment. Aims To investigate the effects of sex, weather conditions, seasonality, and breeding stage on body mass of the Village Weaver Ploceus cucullatus and Northern Red Bishop Euplectes franciscanus in Amurum Forest
-
Evidence that rural wintering bird populations supplement suburban breeding populations Bird Study (IF 0.7) Pub Date : 2022-11-24 Hugh J. Hanmer, Daria Dadam, Gavin M. Siriwardena
ABSTRACT Capsule: Blue Tits Cyanistes caeruleus and Great Tits Parus major wintering in rural areas tended to move further to breed the following breeding season and more frequently cross the urban–rural boundary, than did those wintering in urban gardens. Aims: To explore and quantify the movements of birds from winter to breeding season locations across the urban–rural ecotone at the boundary of
-
Individual, sexual and temporal variation in the winter home range sizes of GPS-tagged Eurasian Curlews Numenius arquata Bird Study (IF 0.7) Pub Date : 2022-11-23 Lucas Mander, Ian Nicholson, Ros M.W. Green, Steve G. Dodd, Rodney M. Forster, Niall H. K. Burton
ABSTRACT Capsule: Eurasian Curlews Numenius arquata were faithful to foraging and roosting areas on their coastal wintering grounds, including a habitat creation site. Home range sizes were greater at night than during the day, and showed high inter-individual variability which was not related to sex. Aims: To examine factors affecting variation in the winter home range size of the largest European
-
Long-term decline and geographical variation in the numbers of moulting Common Eiders Somateria mollissima in Shetland Bird Study (IF 0.7) Pub Date : 2022-11-21 Will Miles, Mick Mellor, Sheila Gear, Paul V. Harvey, Glen Tyler
ABSTRACT Capsule Numbers of moulting Common Eiders Somateria mollissima counted in Shetland during surveys from 1977 to 2019 decreased from approximately 14,500 to an estimated 3600 individuals, a 75% population decline. Aims To report results of extensive surveys of Eiders across Shetland during the annual complete moult period, review historical surveys, and evaluate long-term population changes
-
Association between the distribution of Capercaillies Tetrao urogallus and road and track densities at a landscape scale in a national park Bird Study (IF 0.7) Pub Date : 2022-11-21 Ron W. Summers, Phil Golder, Nicole Wallace, Ewan Munro, Jeremy D. Wilson
ABSTRACT Capsule: The inherited pattern of roads and tracks, now primarily used by people for recreation in the Cairngorms National Park, was associated with a reduced presence of Capercaillie Tetrao urogallus signs in woodland. Aims: To examine if the distribution of Capercaillies in the Cairngorms National Park was associated with the density of roads and tracks that run through woods in the Park
-
Distribution and flight heights of Sandwich Terns Thalasseus sandvicensis during different behaviours near wind farms in the Netherlands Bird Study (IF 0.7) Pub Date : 2022-11-21 Ruben C. Fijn, Mark C. Collier
ABSTRACT Flight heights and behaviour of 1460 Sandwich Terns Thalasseus sandvicensis in the Dutch North Sea were recorded with a laser range finder during ship-based surveys in 2020 and 2021. Over 87% of all Sandwich Terns were flying below 20 m, and fewer than 1.5% were recorded above 40 m, leading to a two-fold increase in the collision risk model estimates for the Borssele offshore wind farm in
-
Loop-migration and non-breeding locations of British breeding Wood Warblers Phylloscopus sibilatrix Bird Study (IF 0.7) Pub Date : 2022-11-16 Malcolm Burgess, Joan Castello, Tony Davis, Chris Hewson
ABSTRACT Capsule: British breeding Wood Warblers Phylloscopus sibilatrix show a clockwise loop migration incorporating stops in southern Europe, the Sahel, and the humid forest zone of West Africa. Aims: To determine autumn and spring migration routes, the location and duration of stopover sites on migration, and the location of non-breeding areas of British breeding Wood Warblers. Methods: In 2016
-
Spatial and temporal variation in breeding performance in the increasing White-tailed Eagle Haliaeetus albicilla population to the east of the Baltic Sea Bird Study (IF 0.7) Pub Date : 2022-10-31 Deivis Dementavičius, Saulius Rumbutis, Rimgaudas Treinys
ABSTRACT Capsule We found no evidence of decreased reproductive performance of the White-tailed Eagle Haliaeetus albicilla, despite ongoing population increases in an environment characterized by different types of utilized habitats. Aim To characterize temporal and spatial variations in several components of breeding performance in an increasing White-tailed Eagle population. Methods The breeding
-
The diet of Monk Parakeet Myiopsitta monachus nestlings in an urban area: a study using stable isotopes Bird Study (IF 0.7) Pub Date : 2022-09-05 D. Mazzoni, J. Pascual, L. Arroyo, T. Montalvo, J. González-Solís, J. C. Senar
ABSTRACT Capsule: Previous observations in Barcelona and other cities showed that approximately 40% of the food ingested by adult Monk Parakeets Myiopsitta monachus is of anthropogenic origin. Here we show that this type of food source is also used for feeding nestlings. Aims: To quantify the proportion of anthropogenic food within the diet of nestling Monk Parakeets, a non-native species in Barcelona
-
Behavioural responses of non-breeding waterbirds to marine traffic in the near-shore environment Bird Study (IF 0.7) Pub Date : 2022-09-02 David Jarrett, John Calladine, Aonghais S. C. P. Cook, Andrew Upton, Jim Williams, Stuart Williams, Jared M. Wilson, Mark W. Wilson, Ian Woodward, Elizabeth M. Humphreys
ABSTRACT Capsule Recording of behavioural responses to ferry traffic for 11 target species showed that Red-throated Diver Gavia stellata, Slavonian Grebe Podiceps auratus, and Black-throated Diver Gavia arctica were most likely to react to passing vessels. Aim To provide information on how responses to marine traffic vary between waterbird species to inform marine spatial planning and environmental
-
The influence of weather on the migration behaviour of Eurasian Bitterns Botaurus stellaris Bird Study (IF 0.7) Pub Date : 2022-08-08 Jan van der Winden, Niels Hogeweg, Edwin Baaij, Peter W. van Horssen, Judy Shamoun-Baranes, René Vos, Theunis Piersma
ABSTRACT Capsule Migration studies of tagged Eurasian Bitterns Botaurus stellaris provide information on the behaviour of this secretive species in relation to weather conditions. Aims To study if cold spells trigger southward migration in resident Eurasian Bitterns. To describe migratory behaviour including flight routes, altitudes, flight direction in relation to wind speed and direction, and general
-
Red Kites Milvus milvus wintering in their natal area: demographic, environmental, and temporary factors affecting spatiotemporal behaviour patterns Bird Study (IF 0.7) Pub Date : 2022-08-08 Jan Škrábal, Ivan Literák, Marek Dostál, Rainer Raab, David Horal, Hynek Matušík, Péter Spakovszky
ABSTRACT Capsule Some birds of the central European population of Red Kite Milvus milvus are non-migratory and winter within their natal area, whereas others migrate to southern Europe or even to northern Africa. Aims To determine what factors affect the area use and communal roost use by Red Kites wintering in their natal area. Methods We studied spatiotemporal activity and factors affecting area
-
Effects of light-level geolocators on return rates and inter-annual territory fidelity of Prairie Warblers Setophaga discolor Bird Study (IF 0.7) Pub Date : 2022-08-08 Steven P. Campbell, Michael E. Akresh, Neil A. Gifford, David I. King
ABSTRACT Capsule In a single-year study, attaching geolocators to male Prairie Warblers Setophaga discolor, one of the smallest species to date to carry geolocators, decreased return rates but had no effect on inter-annual territory fidelity. Aims To examine the effects of light-level geolocators on return rates and inter-annual territory fidelity of adult, male Prairie Warblers migrating to and from