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Cowbird parasitism and nest predation in fragmented grasslands of southwestern Manitoba, p.
The online storytelling platform Cowbird establishes a social media space that engages a range of aesthetic, structural and organisational techniques to facilitate the sequenciation of diverse sources into multi-vocal chronicles of experience.
The species' recovery program, which has focused on adaptive jack pine management, brown-headed cowbird trapping, population monitoring, public education and research, has been extraordinarily effective.
They have been found to exhibit low reproductive success within 600 m of a forest edge in southern Illinois due to cowbird parasitism and predation resulting from fragmentation (Hoover et al.
When scientists removed cowbird eggs from warbler nests, more warbler eggs later got smashed or carried off than did eggs in nests with cowbird eggs in place.
As for birds, the European starling and the brown-headed cowbird are both nest parasites, Swift said.
Unfortunately these stands are not sufficiently large to be impenetrable to Brown-headed Cowbirds, which were found on all transects and are indicators of fragmentation.
These great forest fortresses buffer nesting birds from nest parasites like the brown-headed cowbird and the killing forays of neighborhood house cats that make sorties into suburban-rimmed woodlands.
Named for their feeding habits, cowbird flocks often gather near horses and cows to feast on the insects those animals attract.
I was pleased to find much more detail in the introductory chapters than is typical of many of the author's books, and this may reflect in part the large amount of attention currently being devoted to cowbird studies in the Western Hemisphere and cuckoo studies by several groups in Eurasia.
Most songbirds don't notice when a cowbird lays an egg in its nest.
Except for the placement of meadowlarks and some of the cowbird relatives, this phylogeny agrees closely with traditional views based on morphological analyses (Beecher, 1951).
During visits, we recorded the number of host eggs and young, number of brown-headed cowbird eggs and young, approximate developmental stage of young, parental behavior, and described any nest disturbance.
In the Lower Rio Grande Valley (LRGV) of southern Texas, the 54-g bronzed cowbird (Molothrus aeneus) greatly outnumbers the 36-g brown-headed cowbird (Molothrus ater, Gehlbach, 1987; Brush, 2005).
And because the herds were continually on the move, cowbirds evolved a strategy of nest parasitism, laying eggs in any available nest, moving on with the buffalo, and letting foster parents hatch and raise the cowbird chicks.
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