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Showing 1 to 2 of 2 for “"Red Crossbill"”.
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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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The cost of breeding in the winter versus the summer in an opportunistic, northtemperate songbird, the red crossbill (Loxia curvirostra)
… energy expense in free-living, behaving animals. Red crossbills live at northern latitudes year-round and breed opportunistically throughout much of the year. They therefore offer a unique opportunity to examine the ecophysiology of different life cycle stages under drastically variable seasonal …