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Zonotrichia albicollis
The White-throated Sparrow is a large, full-bodied sparrow with a fairly prominent bill, rounded head, long legs, and long, narrow tail. White-throated Sparrows are brown above and gray below with a striking head pattern. The black-and-white-striped head is augmented by a bright white throat and yellow between the eye and the bill, which is gray. You’ll also see a less boldly marked form, known as “tan-striped,” with a buff-on-brown face pattern instead of white-on-black.
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It comes in two color forms: white-crowned and tan-crowned. The two color forms are determined by genetic differences, and are unique among birds. Individuals almost always mate with a bird of the opposite morph. Males of both color types prefer females with white stripes,and both kinds of females prefer tan-striped males.
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