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Nest-site selection and breeding ecology of Streaked Wren-Babbler(Napothera brevicaudata)in a tropical limestone forest of southern China

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Avian Research 2017年第4期8卷 218-225页

作者： Aiwu Jiang Demeng Jiang Fang Zhou Eben Goodale Guangxi Key Laboratory of Forest Ecology and Conservation College of ForestryGuangxi UniversityNanning 530004China

Background: The breeding information of most birds in Asian tropical areas,especially in limestone forests,is still poorly *** Streaked Wren-Babbler(Napothera brevicaudata) is an uncommon tropical limestone bird with a small *** studied its nest-site selection and breeding ecology,in order to understand the adaptations of birds to the conditions of tropical limestone forest in southern ***: We used methods of systematical searching and parent-following to locate the nests of the Streaked *** measured characteristics of nest sites and rock *** loggers and video cameras were used to monitor the breeding ***: All the observed nests of the Streaked Wren-Babbler were placed in natural shallow cavities or deep holes in large boulders or limestone *** great majority(96.6%) of Streaked Wren-Babbler nests had three eggs with an average fresh weight of 3.46-± 0.43 g(n = 36,range 2.52-4.20 g).Most(80.4%) females laid their first eggs between March and April(n = 46).The average incubation and nestling period of the Streaked Wren-Babbler was 10.2 range 9-11 days),***(87.9%) nests h± 0.4 days(n = 5,range 1011 days) and 10.5 ± 0.8 days(n = 6,ad at least one nestling fledge between 2011 and 2013(n = 33).Conclusions: Our study suggests that several features of the breeding ecology of the Streaked Wren-Babbler,including building nests in rocky cavities,commencing breeding earlier than most species,and reducing foraging times during the incubation period,are well-adapted to the unique habitat of tropical limestone forest.

关键词： Breeding season Breeding strategy Clutch size Karst Incubation rhythm Nest predation nestling development Parental care Reproductive output

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A field guide for aging passerine nestlings using growth data and predictive modeling

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Avian Research 2021年第2期12卷 141-149页

作者： Audrey A.Sanchez Andrew W.Bartlow Allison M.Chan Jeanne M.Fair Aaron A.Skinner Kelly Hutchins Maria A.Musgrave Emily M.Phillips Brent E.Thompson Charles D.Hathcock Environmental Stewardship Los Alamos National LaboratoryLos AlamosNMUSA Biosecurity and Public Health Los Alamos National LaboratoryLos AlamosNMUSA Water Program N3BLos AlamosNMUSA

Background:Accurate nestling age is valuable for studies on nesting strategies,productivity,and impacts on repro-ductive *** aging guides consist of descriptions and photographs that are time consuming to read and subjective to *** Western Bluebird(Sialia mexicana)is a secondary cavity-nesting passerine that nests in coniferous and open deciduous *** box programs for cavity-nesting species have provided suitable nesting locations and opportunities for data collection on nestling growth and ***:We developed models for predicting the age of Western Bluebird nestlings from morphometric meas-urements using model training and *** were developed for mass,tarsus,and two different culmen ***:Our models were accurate to within less than a day,and each model worked best for a specific age *** mass and tarsus models can be used to estimate the ages of Western Bluebird nestlings 0-10 days old and were accurate to within 0.5 days for mass and 0.7 days for *** culmen models can be used to estimate ages of nest-lings 0-15 days old and were also accurate to within less than a *** daily mean,minimum,and maximum values of each morphometric measurement are provided and can be used in the field for accurate nestling age estimations in real ***:The model training and validation procedures used here demonstrate that this method can create aging models that are highly *** methods can be applied to any passerine species provided sufficient nest-ling morphometric data are available.

关键词： Cavity-nesting Nest boxes nestling development Predictive models Western Bluebird

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