Results 31 to 40 of about 680 (164)
Climatic Variability Threatens Population Growth and Persistence of a Declining Grassland Songbird. [PDF]
Ecol EvolDetermining the factors responsible for population change in threatened populations and the degree to which changing climates might put those populations at risk is one of the most pressing roles of conservation science. We tested whether increasing variability in weather could have driven recent declines in songbird population numbers using detailed ...
Freeman NE +4 more
europepmc +2 more sources
The European Zoological Journal, 2018 Avian brood parasites do not raise their own young. Rather, they leave eggs and offspring in nests of other species. Finding potential nests to parasitize is mostly up to the female and requires enhanced spatial memory as the female must remember nest ...
Kathleen S. Lynch
doaj +1 more source
Avian Conservation and Ecology, 2010 In recent decades, many early-succession songbird species have experienced severe and widespread declines, which often are related to habitat destruction. Field borders create additional or enhance existing early-succession habitat on farmland. However,
Jason D. Riddle, Christopher E. Moorman
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Long-term trends in grassland bird relative abundance on focal grassland landscapes in Missouri
PLoS ONE, 2023 North American grassland birds have widely declined over the past 50 years, largely due to anthropogenic-driven loss of native prairie habitat. In response to these declines, many conservation programs have been implemented to help secure wildlife ...
Alexander R. Schindler +7 more
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Frontiers in Ecology and Evolution, 2020 The cognitive demands associated with brood parasitism are substantial. Not only must female parasites locate nests and assess their suitability for parasitism, they must also time parasitism to correspond with the breeding behavior of the host.
David J. White
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No Sex-Differences in Learning Trap-Gap Problems in Zebra Finches. [PDF]
Ecol EvolThis study examined whether male zebra finches, which play a larger role in nest building, show superior physical cognition compared to females using trap‐gap tasks. Contrary to expectations, no sex differences were found in learning or task transfer performance, and most birds relied on simple cue‐based strategies rather than object–gap relationships.
Lambert CT +7 more
europepmc +2 more sources
Do nest size and shape characteristics affect nest parasitism rates?
Wildlife Society Bulletin, 2016 Brown‐headed cowbirds (Molothrus ater) are obligate brood parasites that lay eggs in host species’ nests. Studies on effects of host nest characteristics (e.g., nest placement, concealment, nest size) on parasitism rates by brown‐headed cowbirds have ...
Taylor F. Hackemack +3 more
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When less is best: female brown-headed cowbirds prefer less intense male displays. [PDF]
PLoS ONE, 2012 Sexual selection theory predicts that females should prefer males with the most intense courtship displays. However, wing-spread song displays that male brown-headed cowbirds (Molothrus ater) direct at females are generally less intense than versions of ...
Adrian L O'Loghlen, Stephen I Rothstein
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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 +3 more
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Comparison of capture and escape rates between different types of portable cowbird traps
Wildlife Society Bulletin, 2014 Control of brown‐headed cowbirds (Molothrus ater) is often advocated to reduce parasitism and improve nesting success of sensitive populations of passerine birds, but little information is available in the literature concerning the relative effectiveness
Mary Anne McLeod, Thomas J. Koronkiewicz
doaj +1 more source