General
Harris's Hawk: Large hawk with dark brown head, neck, back, and belly and rust-brown shoulders, underwing coverts and flanks. Tail is dark brown to almost black with white base and terminal band. Undertail coverts are white. Sexes are similar. Juvenile has streaked breast.
Range and Habitat
Harris's Hawk: Resident from southwestern U.S. to southern Chile, central Argentina, and Paraguay. Inhabits lowland areas, sparse woodlands, and semi-desert; prefers a moderate amount of taller vegetation. Also frequents watercourses and protected canyons.
Breeding and Nesting
Harris's Hawk: Two to four white to pale blue eggs, marked with brown or lavender, are laid in a shallow platform made of sticks and twigs, lined with green mesquite, leaves, bark, grass, weeds, roots, and moss, and built on top of a mesquite or in a cactus, Spanish bayonet, or other tree less than 30 feet above the ground. Both parents incubate the eggs for 33 to 36 days; often two broods per year.
Foraging and Feeding
Harris's Hawk: Feeds mainly on rodents such as woodrats, mice, and ground squirrels, but takes birds, often in flight, including ducks, quail, doves, rails, and gallinules; in certain regions of Mexico, its primary food is lizards.
Vocalization
Harris' Hawk: Utters long, harsh screams when disturbed at the nest or otherwise surprised, or when calling for food. Mild disturbance brings on an unimpressive "eee eee eee eee."
Similar Species
Harris's Hawk: Red-shouldered Hawk lacks white patch on tail base and has barred rufous underparts.