ÃÛèÖAPP

Hundreds of kinds of hummingbirds nest in the American tropics, and more than a dozen in the western U.S., but east of the Great Plains there is only the Ruby-throat. There it is fairly common in summer in open woods and gardens. Hovering in front of a flower to sip nectar, it beats its wings more than 50 times per second. Impressive migrants despite their small size, some Ruby-throats may travel from Canada to Costa Rica.

This hardy little bird is a permanent resident along our Pacific Coast, staying through the winter in many areas where no other hummingbirds are present. More vocal than most hummingbirds, males have a buzzy song, often given while perched. In recent decades the species has expanded its range, probably helped along by flowers and feeders in suburban gardens; it now nests north to British Columbia and east to Arizona.

Although it is one of the smaller members in a family of very small birds, this species is notably pugnacious. The male Rufous, glowing like new copper penny, often defends a patch of flowers in a mountain meadow, vigorously chasing away all intruders (including larger birds). The Rufous also nests farther north than any other hummingbird: up to south-central Alaska. Of the various typically western hummingbirds, this is the one that wanders most often to eastern North America, with many now found east of the Mississippi every fall and winter.

A close relative of the Rufous Hummingbird, Allen's has a more limited range, nesting mostly in California. This is one of the two common nesting hummingbirds in northern California gardens (Anna's is the other). Females and immatures of Allen's Hummingbird are almost impossible to separate from Rufous females without close examination, so the status of the species in migration is still being worked out by dedicated hummingbird banders.

Over much of the west, this species is widespread in many habitats at low elevations, often coming into suburban gardens and nesting in back yards within its range. Several other western hummingbirds may stay through the winter, at least in small numbers, but the Black-chin is almost entirely absent from the west in winter.

This is the smallest bird in North America, measuring about 3 inches long and weighing about one-tenth of an ounce. Despite its tiny size, it is able to survive cold summer nights at high elevations in the northern Rockies, and some migrate every year from Canada all the way to southern Mexico. In migration it may be overlooked, often feeding at low flowers and avoiding the aggression of larger hummingbirds.

The desert might seem like a bad place for a creature that feeds at flowers, but it is the favored habitat for Costa's Hummingbird. In Arizona and California deserts, this species nests during late winter and spring, and most then avoid the hot summer by migrating to coastal California and Baja. The thin, high-pitched whistle of the male is often heard over desert washes in early spring.

The metallic wing-trill of the male Broad-tailed Hummingbird is a characteristic sound of summer in the mountain west. This sound is often heard as a flying bird zings past unseen. The birds are seen easily enough, however, at masses of flowers in the high meadows, where they hover and dart around the blossoms, often fighting and chasing each other away from choice patches.