Brown-headed cowbirds exploit a host's compensatory behavioral response to fecundity reduction
نویسندگان
چکیده
منابع مشابه
Host use and fecundity of individual female brown-headed cowbirds
Descriptions of the laying behaviours of obligate brood parasites such as the brown-headed cowbird, Molothrus ater, typically fall into one of two categories. These categories are ‘shotgun behaviour’, where females are predicted to distribute their eggs apparently at random between available host nests, or ‘host selection behaviour’, where females lay their eggs discriminately, placing them int...
متن کاملBehavioral compatibility and reproductive outcomes in two distant populations of captive brown-headed cowbirds (Molothrus ater).
Increased understanding of geographic variation in courtship behavior in animal species can provide insight into the ways behavior may influence evolutionary change. Here, the relationship of geographic variation in courtship behavior to reproductive outcomes was tested in two distant and behaviorally distinct populations of brown-headed cowbirds, Molothrus ater, by comparing rates of copulatio...
متن کاملLong-distance Commuting by Brown-headed Cowbirds in New Mexico
The Brown-headed Cowbird (Molothrus ater) is a widespread brood parasite that has attracted considerable recent attention as a possible threat to forestdwelling songbirds (e.g. Finch 1991, Robinson et al. 1995). Cowbirds are unusual among passerines in that their parasitic nature allows some populations to have spatially and temporally separate breeding and feeding activities (Rothstein et al. ...
متن کاملDevelopmental origins of sociality in brown-headed cowbirds (Molothrus ater).
Five variables were studied relating to the emergence of sociality in hand-reared cowbirds (Molothrus ater): proximity, sex assortment, reactions to adults, head-down displays, and vocalizations. The authors were especially interested in female sociality because adult female birds influence male courtship, song content, and use through proximity, attention, and displays. The authors found that ...
متن کاملDual Signaling during Mating in Brown-headed Cowbirds (Molothrus
:'Ifale hrown-headed cowbirds (,Uo!otbmJ ater) vocalize to females during pair formation, a period usually lasting several days. Males also vocalize to females in the seconds immediately prior to females' adopting copulatory postures. The two major classes of male vocalizations occurring during courtship and copulation arc songs and flight whistles. Observations across the species'''orth Americ...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 2014
ISSN: 1045-2249,1465-7279
DOI: 10.1093/beheco/aru187