Influence of Bill Shape on Ectoparasite Load in Western Scrub-Jays
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چکیده
منابع مشابه
Influence of Bill Shape on Ectoparasite Load in Western Scrub-jays
Populations of the Western Scrub-Jay (Aphelocoma californica) have bills specialized for feeding in their respective habitats. Populations in oak habitat have hooked bills, whereas those in pinyon habitat have pointed bills with a reduced maxillary overhang. Work on other bird species shows that the bill overhang is essential for efficient preening to control ectoparasites. Given the importance...
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Parasites are incredibly diverse. An important factor in the evolution of this diversity is the fact that many parasite species are restricted to 1, or just a few, host species. In addition, some parasites exhibit geographic specificity that is nested within their specificity to a particular species of host. The environmental factors that restrict parasites to particular regions within the host...
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The role of prospective cognition in food caching and recovery by western scrub-jays (Aphelocoma californica) is reviewed. These birds anticipate the short-term consequences of searching for cached food at recovery by reducing their searches for devalued food items. Two further lines of evidence suggest that the jays are also capable of more long-term prospection. First, the caching of food ite...
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ژورنال
عنوان ژورنال: The Condor
سال: 2002
ISSN: 0010-5422,1938-5129
DOI: 10.1093/condor/104.3.675