. Birds of Yellowstone and Grand Teton National Parks . Birds; Birds. Pine Siskin Dean E Biggins RED CROSSBILL (Loxia curvirostra) The unique overlapping mandibles of the crossbill are used for extracting seeds from the cones of conifers. This the crossbill accomplishes by in- serting the closed bill into the side of the cone and then opening the mandibles with a movement which tears out the scales and leaves the seeds exposed. Crossbills often hang from evergreen cones in the manner of a chickadee, while noisily extracting seeds with their peculiar bills. Red crossbills are vagrants, which ma
. Birds of Yellowstone and Grand Teton National Parks . Birds; Birds. Pine Siskin Dean E Biggins RED CROSSBILL (Loxia curvirostra) The unique overlapping mandibles of the crossbill are used for extracting seeds from the cones of conifers. This the crossbill accomplishes by in- serting the closed bill into the side of the cone and then opening the mandibles with a movement which tears out the scales and leaves the seeds exposed. Crossbills often hang from evergreen cones in the manner of a chickadee, while noisily extracting seeds with their peculiar bills. Red crossbills are vagrants, which may be abundant one year and virtually absent from the same general area the following year. The male red cross- bill is brick red with a bright rump area. The female is dull olive-gray, and juveniles are streaked above and below. Red crossbills are inhabitants of the lodgepole pine/spruce-fir and Douglas fir/aspen complexes of both Yellowstone and Grand Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Follett, Dick. [United States] : Yellowstone Library and Museum Association in cooperation with National Park Service, U. S. Dept. of Interior
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Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcollectionbiodiversity, bookleafnumber62, booksubjectbirds
