. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande Valley . ruinj). and mid- dle tail feathers green or bronze, outer feathers purplish dusky ; t;iil slightly forked, outer feathers abruptly narrower than pair next them ; under parts whitish, belly glossed with green. Adult female: under parrs whitish, throat more or less spotted with metallic purple ; sides greenish ; upper parts and middle tail feathers bronzy green, other feathers grayish brown at base, with black subterminal band and white tip. Young : similar to f
. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande Valley . ruinj). and mid- dle tail feathers green or bronze, outer feathers purplish dusky ; t;iil slightly forked, outer feathers abruptly narrower than pair next them ; under parts whitish, belly glossed with green. Adult female: under parrs whitish, throat more or less spotted with metallic purple ; sides greenish ; upper parts and middle tail feathers bronzy green, other feathers grayish brown at base, with black subterminal band and white tip. Young : similar to female, but duller. and feathers of upper parts narrowly tipped with buffv whitish. Male : length , wing , tail bill . Female: length , wing- , tail , bill .70. Remarks. — The scales on the crown distinguish £ i • i • i iroiu Kidgway, Smithsonian. cost* from any common humming-bird except F- m Costa Humming-anna, and in costal the glitter is bluish purple, , . , never pinkish as in anna. The females of annaand costce ma be distinuished by the small size of costa;. and female. from females of Selasphorus and Atthis by absence of rufous on tail. Distribution. --Breeds in Lower Sonoran zone from southern parts ofNew Mexico and Utah to southern California ; migrates to Lower Cali-fornia and other parts of western Mexico. ^Xest. — Loosely made of plant down or shreds of plant fiber lined some-times with feathers and covered with bits of gray lichen, bark, and with web ; placed from 1 to (3 feet from the ground, on cactus, inbushes or trees. Eggs : 2, white. Food. — Insects found on plants and shrubs such as squaw cabbage,wild rose, plum, and cherry. The habits of the Costa hummingbird seem to differ little fromtliose of the family except that it is somewhat more of a desert-lovingspecies. Dr. Fisher states that it is the common hummingbird ofthe desert valleys and mountains of southern California and
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