The calls of a flock of black-cappeds in the fall often signal the presence of migrant warblers and vireos. Polytypic. Length 5.3". Black cap; white cheek; black bib; gray upperparts; greater ...
American white pelicans, brown pelicans, black skimmers and other shorebirds ... lark buntings and other gregarious birds also flock together in murmurs and/or swarms. Why do they flock, murmurate ...
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