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CAN SELECTION BY AN ECTOPARASITE DRIVE A POPULATION OF RED CROSSBILLS FROM ITS ADAPTIVE PEAK?
Abstract The bill structures of different call types of red crossbills (Loxia curvirostra complex) in western North America usually approximate the predicted optima for foraging on single species ofExpand
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Survival and population size of a resident bird species are declining as temperature increases.
1. A large number of migratory bird species appear to be declining as the result of climate change, but whether resident bird species have or will be adversely affected by climate change is lessExpand
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Variable Resource Availability When Resource Replenishment is Constant: The Coupling of Predators and Prey
ABSTRACT. Although food resources are thought to limit many populations, the extent to which the population dynamics of predators and prey are coupled is rarely known. We examined a sedentaryExpand
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Projecting Avian Responses to Landscape Management Along the Middle Rio Grande, New Mexico
Abstract Most lowland rivers in the southwestern United States have been impounded, diverted, or dewatered. Lack of flooding due to river impoundments on the Middle Rio Grande has contributed to theExpand
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CAN SELECTION BY AN ECTOPARASITE DRIVE A POPULATION OF RED CROSSBILLS FROM ITS ADAPTIVE PEAK?
Abstract The bill structures of different call types of red crossbills (Loxia curvirostra complex) in western North America usually approximate the predicted optima for foraging on single species ofExpand
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Habitat characteristics of Great Gray Owl sites in the Siskiyou Mountains of southwestern Oregon
--Great Gray Owls (St,ix nebulosa) were located at 92 sites, 1991-97, on the northern slopes of the Siskiyou Mountains of southwestern Oregon. We characterized habitat at the 28 sites includingExpand
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