Results 21 to 30 of about 570 (161)

Effects of nest concealment on nest predation and cowbird parasitism, flight initiation distance and female stress levels in the Wood Thrush

Journal of Field Ornithology, 2023
Temperate zone songbirds in North America can experience high levels of nest predation and Brown-headed Cowbird (Molothrus ater) parasitism, which may contribute to population declines, and an important question is whether nesting females can mitigate ...
Alexandra M. Israel, Sue Hayes, Brendan P. Boyd, Bridget J. M. Stutchbury   +3 more
doaj  

Twenty-two years of brood parasitism data do not support the mafia hypothesis in an accepter host of the Brown-headed Cowbird (Molothrus ater)

Journal of Field Ornithology, 2022
Most host species of the obligate brood parasitic Brown-headed Cowbird (Molothrus ater) accept foreign eggs and offspring despite the associated reproductive costs.
Abbigail M. Turner, Mark E. Hauber, Dustin G. Reichard   +2 more
doaj  

Does Seasonal Variation in Agility of Avian Prey Influence Body Size of Breeding Male Cooper's Hawks? And Comments on the Putative Influence of Avivory on Reproductive Output in Cities. [PDF]

Ecol Evol
Our findings regarding prey of breeding Cooper's Hawks in British Columbia and Wisconsin expand knowledge of their food habits and support the premise that seasonal agility of prey influences body size of nesting males. We deem it untenable to assume greater production of young at urban vs. rural nests based on proportion of avian prey use.
Rosenfield RN, Stewart AC, Frater PN, Holmgren EL.   +3 more
europepmc   +2 more sources

Beak abnormality in Coturnixcoturnix japonica

Environment Conservation Journal, 2011
A reporting of an abnormality in the beak in a male Japanese quail, Coturnixcoturnix japonica, has been discussed in this paper. During the behavioral study of Japanese quails, a male differed markedly from the others due to its comparatively longer ...
R. R. Gabhane, R. Yosef, P. N. Charde, S. B. Zade   +3 more
doaj   +1 more source

FEMALE BROWN-HEADED COWBIRD WITH PARTIAL MALE PLUMAGE

The Wilson Bulletin, 2004
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Summers, Scott G, Kostecke, Richard M
openaire   +3 more sources

Managing brown‐headed cowbirds to sustain abundance of black‐capped vireos

Wildlife Society Bulletin, 2013
Brood parasites can appreciably decrease fecundity of susceptible songbird hosts, which can often cause a decrease in host abundance. Wildlife managers use brown‐headed cowbird (Molothrus ater) management to reduce parasitism frequency and benefit the ...
Kathryn N. Smith, Andrew J. Campomizzi, Michael L. Morrison, R. Neal Wilkins   +3 more
doaj   +1 more source

Reticence or vigilance at the nest: a cruel bind for the endangered Black-capped Vireo

Avian Conservation and Ecology, 2017
Breeding birds vocalize to find mates and establish and defend territories, but these same critical communications may also attract predators or brood parasites, placing birds in a cruel bind.
Lauren E. Walker, John M. Marzluff
doaj   +1 more source

Egg rejection behavior does not explain the lack of cowbird parasitism on an eastern North American population of Red-winged Blackbirds

Avian Research, 2019
Background Red-winged Blackbirds (Agelaius phoeniceus), hereafter red-wings, are much less frequently parasitized by Brown-headed Cowbirds (Molothrus ater) in eastern North America than in central North America and had not been recorded as hosts in our ...
Justin J. Reel, Todd J. Underwood
doaj   +1 more source

Breeding Biology of Grassland Birds in Western New York: Conservation and Management Implications

Avian Conservation and Ecology, 2010
Declining grassland breeding bird populations have led to increased efforts to assess habitat quality, typically by estimating density or relative abundance.
Christopher J. Norment, Michael C. Runge, Michael R. Morgan   +2 more
doaj   +1 more source

Assessing bird avoidance of high-contrast lights using a choice test approach: implications for reducing human-induced avian mortality [PDF]

PeerJ, 2018
Background Avian collisions with man-made objects and vehicles (e.g., buildings, cars, airplanes, power lines) have increased recently. Lights have been proposed to alert birds and minimize the chances of collisions, but it is challenging to choose ...
Benjamin Goller, Bradley F. Blackwell, Travis L. DeVault, Patrice E. Baumhardt, Esteban Fernández-Juricic   +4 more
doaj   +2 more sources