Begging and cowbirds: brood parasites make hosts scream louder

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Begging and cowbirds: brood parasites make hosts scream louder

Avian brood parasites have evolved striking begging ability that often allows them to prevail over the host progeny in competition for parental resources. Host young are therefore selected by brood parasites to evolve behavioral strategies that reduce the cost of parasitism. We tested the prediction that the intensity of nestling begging displays functioning to attract parental care increases a...

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Brown-headed cowbirds (Molothrus ater) might reduce populations of the songbird species they parasitize, including endangered species. Data are therefore needed on the frequency with which cowbirds use different species of foster parents. Hahn et al. propose a clever new approach by which the identity of foster parents can be inferred from host-specific lice the cowbirds acquire as nestlings. W...

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Differences in intestinal microbiota between avian brood parasites and their hosts

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Brood parasites provide a particularly good opportunity for the study of host-parasite evolution because they directly affect the reproductive success of their hosts. Two parasitic species, the common cuckoo (Cuculus canorus) and the brown-headed cowbird (Molothrus ater), differ widely in their relationships with their hosts, yet share the attribute of having been particularly well studied by b...

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BACKGROUND Co-evolutionary struggles between dangerous enemies (e.g., brood parasites) and their victims (hosts) lead to the emergence of sophisticated adaptations and counter-adaptations. Salient host tricks to reduce parasitism costs include, as front line defence, adult enemy discrimination. In contrast to the well studied egg stage, investigations addressing the specific cues for adult enem...

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ژورنال

عنوان ژورنال: Behavioral Ecology

سال: 2008

ISSN: 1045-2249,1465-7279

DOI: 10.1093/beheco/arn137