Thermoregulation in the Red-Breasted Nuthatch (Sitta canadensis)
نویسندگان
چکیده
منابع مشابه
Parental investment strategies in two species of nuthatch vary with stage-specific predation risk and reproductive effort.
Life-history theory predicts that differences in reproductive effort and residual reproductive value among species should result in differences in the level of risk that parents are willing to tolerate to themselves versus their offspring. Specifically, highly fecund and shorter-lived species are expected to place greater value in current offspring than themselves, whereas less fecund and longe...
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Many cooperatively breeding birds exhibit fi ne-scale spatial genetic structure as a result of restricted dispersal and habitat specialization. Sitta pusilla (Brown-headed Nuthatch) is a cooperatively breeding bird restricted to mature pine-dominated forests of the southeastern United States and has been undergoing population declines across most of its range. We used fi ve polymorphic microsat...
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This study presents clutch size, egg-characteristics and within-clutch egg dimensions variation in Nuthatch Sitta europaea in deciduous forests (Hrvatsko zagorje area; NW Croatia). Study comprised the period from 2000 to 2002. Cluch size were 5–8 eggs (mean = 6.63, modal = 7 eggs). Egg length averaged 19,79 mm, egg breadth 14.42 mm, egg volume 2099.66 mm3 and egg shape index 1,37 (during tree y...
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there is little chance for species with competitor to develop intraspecific variability such as sexual dimorphism. sitta tephronota is a well-known rock-dwelling bird species in iran, which occurs in zagros mountains in strong ecological competition with sitta neumayer. thus, no sexual dimorphism is expected for sitta tephronota in this area. despite the role of this species in the rise of the ...
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Fuel-reduction/forest restoration treatments that consist of thinning followed by prescribed burning are becoming increasingly important land management actions that likely affect various wildlife species. To assess potential effects on bark-gleaning birds, we compared the foraging patterns of five cavity-nesting species in thinned and burned ponderosa pine (Pinus ponderosa) forest sites and co...
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ژورنال
عنوان ژورنال: The Condor
سال: 1970
ISSN: 0010-5422,1938-5129
DOI: 10.2307/1366621