Results 1 to 10 of about 70 (69)

Inter‐ and intra‐individual variation in the feather coloration of American crows

Journal of Avian Biology
Avian feathers are remarkably diverse in both form and function. Coloration is among the most studied feature of feathers, but we know relatively little about melanin‐based black coloration.
Jessica L. Yorzinski, Anne B. Clark
doaj   +2 more sources

American crows that excel at tool use activate neural circuits distinct from less talented individuals

Nature Communications, 2023
Tools enable animals to exploit and command new resources. However, the neural circuits underpinning tool use and how neural activity varies with an animal’s tool proficiency, are only known for humans and some other primates.
LomaJohn T. Pendergraft, John M. Marzluff, Donna J. Cross, Toru Shimizu, Christopher N. Templeton   +4 more
doaj   +1 more source

West Nile Virus Detection in American Crows

Emerging Infectious Diseases, 2003
A dipstick immunochromatographic assay used for West Nile virus (WNV) detection in mosquitoes was investigated for application to testing of fecal, saliva, and tissue samples from dead American Crows (Corvus brachyrhynchos).
Sarah A. Yaremych, Richard E. Warner, Marshall T. Van de Wyngaerde, Adam M. Ringia, Richard Lampman, Robert J. Novak   +5 more
doaj   +1 more source

Niche partitioning of avian predators in northern grasslands amended by biosolids

Ecology and Evolution, 2021
Many food webs are affected by bottom‐up nutrient addition, as additional biomass or productivity at a given trophic level can support more consumers. In turn, when prey are abundant, predators may converge on the same diets rather than partitioning food
Arianna E. C. Ormrod, Francis I. Doyle, Kirstie J. Lawson, Karen E. Hodges   +3 more
doaj   +1 more source

Crow Deaths Caused by West Nile Virus during Winter

Emerging Infectious Diseases, 2007
In New York, an epizootic of American crow (Corvus brachyrhynchos) deaths from West Nile virus (WNV) infection occurred during winter 2004–2005, a cold season when mosquitoes are not active.
Jennifer R. Dawson, Ward B. Stone, Gregory D. Ebel, David S. Young, David S. Galinski, Jason P. Pensabene, Mary A. Franke, Millicent Eidson, Laura D. Kramer   +8 more
doaj   +1 more source

American Crow Brain Activity in Response to Conspecific Vocalizations Changes When Food Is Present

Frontiers in Physiology, 2021
Social interaction among animals can occur under many contexts, such as during foraging. Our knowledge of the regions within an avian brain associated with social interaction is limited to the regions activated by a single context or sensory modality. We
LomaJohn T. Pendergraft, John M. Marzluff, Donna J. Cross, Toru Shimizu, Christopher N. Templeton   +4 more
doaj   +1 more source

Rapid West Nile Virus Antigen Detection

Emerging Infectious Diseases, 2005
We compared the VecTest WNV antigen assay with standard methods of West Nile virus (WNV) detection in swabs from American Crows (Corvus brachyrhynchos) and House Sparrows (Passer domesticus). The VecTest detected WNV more frequently than the plaque assay
Nicholas A. Panella, Kristen L. Burkhalter, Stanley A. Langevin, Aaron C. Brault, Lynn M. Schooley, Brad J. Biggerstaff, Roger S. Nasci, Nicholas Komar   +7 more
doaj   +1 more source

Susceptibility of Carrion Crows to Experimental Infection with Lineage 1 and 2 West Nile Viruses

Emerging Infectious Diseases, 2015
West Nile virus (WNV) outbreaks in North America have been characterized by substantial die-offs of American crows (Corvus brachyrhynchos). In contrast, a low incidence of bird deaths has been observed during WNV epidemic activity in Europe.
Stephanie M. Lim, Aaron C. Brault, Geert van Amerongen, Angela M. Bosco-Lauth, Hannah Romo, Varsha D. Sewbalaksing, Richard A. Bowen, Albert D.M.E. Osterhaus, Penelope Koraka, Byron E.E. Martina   +9 more
doaj   +1 more source

Plastic and the nest entanglement of urban and agricultural crows. [PDF]

PLoS ONE, 2014
Much attention has been paid to the impacts of plastics and other debris on marine organisms, but the effects of plastic on terrestrial organisms have been largely ignored.
Andrea K Townsend, Christopher M Barker
doaj   +1 more source

Comparative West Nile Virus Detection in Organs of Naturally Infected American Crows (Corvus brachyrhynchos)

Emerging Infectious Diseases, 2001
Widespread deaths of American Crows (Corvus brachyrhynchos) were associated with the 1999 outbreak of West Nile (WN) virus in the New York City region. We compared six organs from 20 crow carcasses as targets for WN virus detection.
Nicholas A. Panella, Amy J. Kerst, Robert S. Lanciotti, Patricia Bryant, Bruce Wolf, Nicholas Komar   +5 more
doaj   +1 more source