Baby Hummingbirds In The Nest

Hummingbirds are restricted to the Americas from southern Alaska to Tierra del Fuego, including the Caribbean. The majority of species occur in tropical and subtropical Central and South America, but several species also breed in temperate climates and some hillstars occur even in alpine Andean highlands at altitudes of up to 5,200 metres (17,100 ft). The greatest species richness is in humid tropical and subtropical forests of the northern Andes and adjacent foothills, but the number of species found in the Atlantic Forest, Central America or southern Mexico also far exceeds the number found in southern South America, the Caribbean islands, the United States and Canada. While fewer than 25 different species of hummingbirds have been recorded from the United States and fewer than 10 from Canada and Chile each, Colombia alone has more than 160 and the comparably small Ecuador has about 130 species. The migratory Ruby-throated Hummingbird breeds in the southeastern United States, while the Black-chinned Hummingbird, its close relative and another migrant, is the most widespread and common species in the southwestern United States, while the Rufous Hummingbird is the most widespread species in western North America.
Migration
Most hummingbirds of the U.S. and Canada migrate south in fall to spend winter in Mexico or Central America. A few southern South American species also move north to the tropics during the southern winter. A few species are year-round residents in the warmer coastal and southern desert regions of the USA. Among these are Anna's Hummingbird, a common resident from California inland to Arizona and north to the southwestern coastal and south-central interior of British Columbia, and Buff-bellied Hummingbird, an uncommon resident in subtropical woodlands of southern Texas.