Red-shouldered Hawk (Buteo lineatus) is relatively large (17-24 inches) hawk with a brown back, barred white-and-black wings, broad black tail banded and large rust-colored shoulder patches visible from above or while perching. The chest is also rust colored. Like most species of raptors, females are larger than males.
They have a distinctive call that you can listen to here: http://www.allaboutbirds.org/guide/Red-shouldered_Hawk/sounds
Similar speciesCooper's Hawk (and Sharp-shinned Hawk) - the Red-shouldered Hawk is larger, chunkier, has a much shorter, fan shaped tail. Cooper's hawks are accipiters and have lankier bodies and shorter wings, with long tails.
Red-tailed Hawks are larger than Red-shouldered Hawks, with broader wings, and slower wingbeats. Adult Red-tails usually show a reddish top of the tail, a dark-streaked “belly band,” and pale wings with a dark bar at the leading edge. (http://www.allaboutbirds.org/guide/Red-shouldered_Hawk/id).
Often seen perching in trees along edges of campus or flying overhead. We probably have a resident nesting pair (or at least they nest very close by). You are more likely to hear them than to see them.
In the West, they live in riparian and oak woodlands, and also in eucalyptus groves and some urban and suburban parks and neighborhoods.
Nesting Males and females build nests from sticks, moss, bark and other materials, typically high up in a tree. They continuously bring leaves to the nest throughout the nesting period. Red-shouldered hawks are territorial and will return to the same nest and refurbish it year after year. Usually only produce one brood/year.
Feeding Red-shouldered Hawks primarily eat small vertebrates, including small mammals, amphibians, and occasionally small songbirds and doves.
The Red-shouldered Hawk primarily breeds in the eastern United States and southeastern Canada, withdrawing from northern portions of its range and expanding south into northern Mexico in winter. Unusually for a North American hawk, the Red-shouldered Hawk has another population, separated from the main population by thousands of miles, that is a permanent resident along the Pacific coast of California.
Western populations are non-migratory.