. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande Valley . 142 HUMMINGBIRDS. 1 10111 liidgway, 320. Calliope Hummingbird 2, white , tail ., exposed culmen .: length , wing- , bill .58-60. Hemarks. — This is the smallest humming-bird in the United States, and may be distin-guished by its size together with the largeamount of rufous on its under parts and thesmall amount on its tail. Distribution. — Breeds in Canadian andperhaps Transition zone in we
. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande Valley . 142 HUMMINGBIRDS. 1 10111 liidgway, 320. Calliope Hummingbird 2, white , tail ., exposed culmen .: length , wing- , bill .58-60. Hemarks. — This is the smallest humming-bird in the United States, and may be distin-guished by its size together with the largeamount of rufous on its under parts and thesmall amount on its tail. Distribution. — Breeds in Canadian andperhaps Transition zone in western moun-tains from British Columbia to southern Cali-fornia, and east to Colorado ; migrating as farsouth as mountains of Guerrero, Mexico. Nest. — Willow down, protectingiy col-ored with bits of bark and shreds of cone,placed on or against a dry cone or dead limb of a pine. Eggs The Calliope hummingbird is the smallest of the TrocMlidcBfound within the United States. It is a mountain-loving species,and during the breeding season is rarely met with below altitudesof 4000 feet, and much more frequently between 6500 to 8000 favorit
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