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Strategic egg destruction by brood-parasitic cowbirds?
(Elsevier, 2014-06)
Obligate avian brood parasites do not provide direct care to their young but can indirectly increase their offspring's success in host nests. One way in which parasitic cowbirds (Molothrus sp.) could achieve this is through ...
Host-parasite coevolution beyond the nestling stage?: Mimicry of host fledglings by the specialist screaming cowbird
(The Royal Society, 2012-05)
textbook examples of host-parasite coevolution. By contrast, reciprocal adaptations and counteradaptations beyond the egg stage in brood parasites and their hosts have received less attention. The screaming cowbird (Molothrus ...
Do shiny cowbird females adjust egg pecking behavior according to the level of competition their chicks face in host nests?
(Elsevier Science, 2012-02)
Interspecific brood parasites, like the shiny cowbird (Molothrus bonariensis), lay eggs in nests of other species. Shiny cowbird females peck and puncture eggs when they parasitize host nests. This behavior increases the ...
Antiparasitic defenses in hosts of South American cowbirds
(China Ornithological Society, 2013-06)
The cowbirds (Molothrus, Icteridae) are a monophyletic group that includes five extant brood-parasitic species. The Screaming (M. rufoaxillaris), Giant (M. oryzivorus) and Shiny (M. bonariensis) cowbirds range mostly in ...
Screaming Cowbird parasitism on nests of Solitary Caciques and Cattle Tyrants
(Wilson Ornithological Society, 2010-12)
The Screaming Cowbird (Molothrus rufoaxillaris) is one of the most specialized brood parasites with only three known hosts: Baywing (Agelaioides badius), the main host throughout most of its range, and two alternative hosts ...
Thick eggshells of brood parasitic cowbirds protect their eggs and damage host eggs during laying
(Oxford University Press, 2018-07)
Brood parasites lay thick-shelled eggs and numerous hypotheses have been proposed to explain the significance of this trait. We examined whether thick eggshells protect the parasite egg during laying events. We used eggs ...
Brood parasitism increases mortality of Bay-winged cowbird nests
(Cooper Ornithological Society, 2010-05)
Los tordos parásitos de cría (Molothrus spp.) pueden causar el fracaso total del nido directamente al inducir el abandono de los nidos o destruir la puesta del hospedador, o indirectamente, a través de facilitar la depredación ...
Host provisioning behavior favors mimetic begging calls in a brood-parasitic cowbird
(Oxford University Press, 2017-12)
The vocalizations of some young brood-parasitic birds closely resemble those of their host's young. Such similarities might arise because hosts bestow the greatest parental care in response to their own species' call type. ...
South American Cowbirds as Avian Models for Environmental Toxicity Testing
(Royal Society of Chemistry, 2017)
In environmental toxicity testing, the use of native species is normally recommended as it provides greater environmental realism and insures a more conservative end point for protecting ecosystems. Although pesticide ...
Brown-and-yellow marshbirds reduce their acceptance threshold of mimetic brood parasite eggs in the presence of non-mimetic eggs
(Springer Tokyo, 2016-01)
The recognition and subsequent rejection of brood parasite eggs is one of the most commonly observed defensive behaviors of the host. The brown-and-yellow marshbird (Pseudoleistes virescens) is a common host of the shiny ...