Mexican Chickadee
737. Penthestes sclateri. 5 inches.
Range.—Arizona into Mexico. Has more black on the throat. Habits and their nest and eggs are much the same.
Mountain Chickadee
738. Penthestes gambeli. 5½ inches.
Range.—Western North America, Rocky Mountains west. Habits same as the preceding.
Alaska Chickadee
739. Penthestes cinctus alascensis. 5 inches.
Range.—Alaska and eastern Siberia. One would naturally think that these little animated bunches of feathers would freeze in the far north where they make their homes. But they are the same sprightly little “chick-a-dee-dee-dee” that we have farther south, and do not seem to mind the severe cold at all. In habits, nest and eggs, these birds are so near alike that it is impossible to identify them.