Results 51 to 60 of about 1,383,255 (209)

Microphone variability and degradation: implications for monitoring programs employing autonomous recording units

Avian Conservation and Ecology, 2017
Autonomous recording units (ARUs) are emerging as an effective tool for avian population monitoring and research. Although ARU technology is being rapidly adopted, there is a need to establish whether variation in ARU components and their degradation ...
Patrick J. Turgeon, Steven L. Van Wilgenburg, Kiel L. Drake   +2 more
doaj   +1 more source

_Limusaurus_ and bird digit identity [PDF]

, 2009
_Limusaurus_ is a remarkable herbivorous ceratosaur unique among theropods in having digits II, III and IV, with only a small metacarpal vestige of digit I. This raises interesting questions regarding the controversial identity of avian wing digits.
Alexander O. Vargas, Gü, Jacques A. Gauthier   +2 more
core   +1 more source

Resighting data reveal weak connectivity from wintering to breeding grounds in a range-restricted and endangered long-distance migratory passerine

Avian Conservation and Ecology, 2018
Understanding migratory connectivity is fundamental to the ecology, evolution, and conservation of migratory species. The endangered Kirtland's Warbler (Setophaga kirtlandii) has a restricted breeding range in early successional jack pine (Pinus ...
Nathan W. Cooper, David N. Ewert, Kimberly R. Hall, Sarah M. Rockwell, Dave Currie, Joseph M. Wunderle, Jr., Jennifer D. White, Peter P. Marra   +7 more
doaj   +1 more source

II. BIRDS.

Proceedings of the Zoological Society of London, 1887
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +2 more sources

Status and distribution changes of the endangered Green Peafowl (Pavo muticus) in China over the past three decades (1990s‒2017)

Avian Research, 2018
Background Understanding the changes in population dynamics, including demographics, distribution and threats, is essential for species status assessing.
Dejun Kong, Fei Wu, Pengfei Shan, Jianyun Gao, Dao Yan, Weixiong Luo, Xiaojun Yang   +6 more
doaj   +1 more source

Bird Beak Accuracy Assessment [PDF]

, 2003
The purpose of this resource is to quantitatively evaluate the accuracy of a classification system. Students sort birds into three possible classes based on each bird's beak: carnivores, herbivores, and omnivores.
The GLOBE Program, University Corporation for Atmospheric Research (UCAR)
core  

Incorporating human dimensions objectives into waterfowl habitat planning and delivery

Wildlife Society Bulletin, 2017
The 2012 revision of the North American Waterfowl Management Plan (NAWMP) explicitly recognized the need to increase recruitment and retention of waterfowl hunters, birdwatchers, and other conservationists to maintain support for wetland conservation ...
Patrick K. Devers, Anthony J. Roberts, Scott Knoche, Paul I. Padding, Robert Raftovich   +4 more
doaj   +1 more source

Grass Hosts of Cereal Aphids (Hemiptera: Aphididae) Between Wheat-Cropping Cycles in South Dakota [PDF]

, 2018
Several grasses may serve as alternative hosts for cereal aphids during the interim between small-grain crops in South Dakota, but field studies to determine which grasses are important have not been undertaken.
Dagel, Kurt J, Hesler, Louis S
core   +2 more sources

Extreme migratory connectivity and apparent mirroring of non-breeding grounds conditions in a severely declining breeding population of an Afro-Palearctic migratory bird

Scientific Reports
Understanding the distribution of breeding populations of migratory animals in the non-breeding period (migratory connectivity) is important for understanding their response to environmental change.
Máire Kirkland, Nathaniel N. D. Annorbah, Lee Barber, John Black, Jeremy Blackburn, Michael Colley, Gary Clewley, Colin Cross, Mike Drew, Oliver J. L. Fox, Vicky Gilson, Steffen Hahn, Chas Holt, Mark F. Hulme, John Jarjou, Dembo Jatta, Emmanuel Jatta, Kevin Leighton, Ernestina Mensah-Pebi, Chris Orsman, Naffie Sarr, Roger Walsh, Leo Zwarts, Robert J. Fuller, Philip W. Atkinson, Chris M. Hewson   +25 more
doaj   +1 more source

Black-backed Woodpecker occupancy is extensive in green conifer forests of the southern Cascade Mountains, Oregon

Avian Conservation and Ecology, 2021
Black-backed Woodpeckers (Picoides arcticus) are widely considered a burned forest specialist across much of their range. Several recent studies have examined their occurrence in "green" coniferous forests that have not been recently burned, but Black ...
Jake Verschuyl, Jaime L. Stephens, Andrew J. Kroll, Katherine E. Halstead, Dennis Rock   +4 more
doaj