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Showing 1 to 3 of 3 for “"Loxia curvirostra"”.
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Vocalizations and morphology of the red crossbill (Loxia curvirostra L.) in the southern Appalachians
Two distinct forms of Red Crossbill (Loxia curvirostra) bred sympatrically in the southern Appalachians in 1983. The forms differed significantly in vocalizations and bill and body size, and the members of each of 20 male-female pairs were of the same size class. One of the forms from Virginia has …
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Influence of social cues on the initiation of migratory behavior in red crossbills (Loxia curvirostra)
… behavior and physiology. Red crossbills (<em>Loxia curvirostra</em>) are gregarious, nomadic migrants that make seasonal movements to find patchily-distributed conifer seeds and are responsive to social cues in the context of food. I test the hypothesis that social cues can influence migratory …
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The cost of breeding in the winter versus the summer in an opportunistic, northtemperate songbird, the red crossbill (Loxia curvirostra)
<p>Energy is the currency of life, where a surplus allows survival and reproduction and a longstanding debt leads to death, yet monitoring energy expenditures in free-living animals has been relatively limited by available technology. Radio transmitters that have been specially modified to detect …