Results 11 to 20 of about 789 (145)

Evaluation of lasers to disperse American crows, Corvus brachyrhynchos, from urban night roosts

International Journal of Pest Management, 2002
American crows ( Corvus brachyrhynchos ) have a long history of causing agricultural damage in North America. Shooting and bombing at crow night roosts have been employed to reduce such damage. Most roosts were located in rural locations, but in the latter half of the 1900s crows began to roost in urban locations.
Gorenzel, W.P., Blackwell, B. F., Simmons, G.D., Salmon, T.P., Dolbeer, R.A.   +4 more
openaire   +4 more sources

Opportunistic Tool Use by Two Unexpected Corvid Species. [PDF]

Ecol Evol
Picture exemplifying the crow tool use. ABSTRACT This Nature note reports the first documented instance of tool use in Sunda crows (Corvus enca) and provides additional evidence of this ability in house crows (Corvus splendens). At Singapore Zoo (December 2023), individuals from both species spontaneously manipulated a hooked stick to extract food ...
Giri T, Garcia-Pelegrin E.
europepmc   +2 more sources

I'm Not Like the Others: Atypical Research Subjects in JEAB Publications. [PDF]

J Exp Anal Behav
Abstract Comparative psychologists have been criticized for using a limited number of species in drawing general conclusions about broad behavioral processes. There are numerous examples, however, of the inclusion by behavior analysts of atypical subjects in their research.
Fernandez EJ, Lattal KA.
europepmc   +2 more sources

Transmission of Urgency Levels in the Alarm Calls of the Oriental Reed Warbler. [PDF]

Ecol Evol
Previous studies revealed that oriental reed warblers (Acrocephalus orientalis) produce alarm calls containing diverse syllable types in response to intruders. We selected three distinct syllable types from these calls (B, D and F alarm calls) for playback experiments to test whether different syllable types convey graded urgency information. Our study
Zhou Q, Ma L, Guo W, Wang J, Wang L.
europepmc   +2 more sources

Intensity of Nest Defense of White-Winged Choughs (<i>Corcorax melanoramphos</i>) in Urban Versus Natural Habitats. [PDF]

Ecol Evol
Urbanization changes various conditions for birds to raise their young. Urban areas often have more predators, which forces parents to spend more time and energy protecting their nests. However, this can be difficult because they also need to forage and perform other activities. We studied white‐winged choughs and found that those living in urban areas
Shekar ES, Nyaguthii B, Farine DR.
europepmc   +2 more sources

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

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

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

Marginal learning-set formation by the crow (Corvus brachyrhynchos) [PDF]

Bulletin of the Psychonomic Society, 1975
Each of three hand raised crows received 300 learning set problems in a modified WGTA using three-dimensional stimuli. Consistent within-problem learning was obtained but learning set formation was minimal. An analysis of hypothesis behavior (Levine, 1959) revealed a strong tendency towards position and stimulus preferences.
Hunter III, Maxwell W, Kamil, Alan C
openaire   +1 more source