SummaryWe conducted research into the ‘Data Deficient’ and endemic Tagula Honeyeater Microptilotis vicina of the Louisiade Archipelago, Papua New Guinea. This species was only observed on Sudest and Junet Islands. Islands were visited between October and January in the years from 2012–2014 and in 2016. We conducted the first assessment of spatial and habitat use by this species using radio-tracking in 2016. These findings were also used to inform estimates using traditional population density methods. CTMM package in R was used for home-range estimation for the tracked honeyeaters. Our results supported that members of this species display territoriality during the breeding season, occupying a mean of 2.0 ± 0.6 (SE) ha on Junet Island (n = 5). Whether individuals defended defined territories at other times of the year was not known but re-sightings of marked birds confirmed them to be locally resident. Population estimates ranged between 53,000 and 85,000 individuals. However, more conservative estimates nearing 50,000 individuals were considered prudent given lower population densities observed on parts of the larger Sudest Island (0.64/ha). This species utilised the canopy and understorey layers in a range of habitats from mangroves at sea-level, gardens and regrowth of various ages to cloud forest on the highest point of Sudest Island (∼800 m asl). Dietary observations support that like many closely related species, Tagula Honeyeaters have a broad diet of mostly insects supplemented with nectar and fruit. Observations indicated that this species had life history attributes toward the slower end of the spectrum but similar to other congeners. Vocalisations were more diverse in both structure and complexity than those of suspected close relatives the Mimic Microptilotis analogus and Graceful Microptilotis gracilis Honeyeaters. Morphological measures were similarly different, supporting species level recognition.

中文翻译：

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对 Tagula Honeyeater Microptilotis vicina 的评估，这是美拉尼西亚流行热点中的一种数据缺乏鸟类

总结我们对“数据缺乏”和地方性的 Tagula Honeyeater 进行了研究小蠹巴布亚新几内亚路易斯亚德群岛。该物种仅在 Sudest 和 Junet 岛上观察到。在 2012 年至 2014 年和 2016 年的 10 月至 1 月期间访问了岛屿。我们在 2016 年使用无线电跟踪对该物种的空间和栖息地使用进行了首次评估。这些发现还用于为使用传统人口密度的估计提供信息方法。R 中的 CTMM 包用于对被跟踪的食蜜者进行家庭范围估计。我们的结果支持该物种的成员在繁殖季节表现出地域性，在朱尼特岛平均占据 2.0 ± 0.6 (SE) 公顷（n= 5)。个人是否在一年中的其他时间保卫特定领土尚不清楚，但重新目击标记的鸟类证实它们是当地居民。人口估计在 53,000 到 85,000 人之间。然而，鉴于在较大的 Sudest 岛部分地区观察到的人口密度较低（0.64/公顷），更保守的估计接近 50,000 人被认为是谨慎的。该物种利用了一系列栖息地的冠层和下层，从海平面的红树林、花园和不同年龄的再生长到 Sudest 岛最高点的云林（~800 m asl）。饮食观察支持，像许多密切相关的物种一样，塔古拉蜜食者有广泛的饮食，主要是昆虫，辅以花蜜和水果。观察表明，该物种具有较慢的生活史属性，但与其他同类相似。发声在结构和复杂性上都比拟态者疑似近亲的发声更加多样化类似小蠹和优雅纤细小蠹食蜜者。形态测量同样不同，支持物种水平识别。