Overview
Tree Swallow: Medium-sized swallow with iridescent blue-green upperparts and white underparts. The wings are dark gray and tail is dark and forked. Black bill, legs and feet. Swift, graceful flight, alternates slow, deep wing beats with short or long glides. Turns back sharply on insects it passes.
Range and Habitat
Tree Swallow: Breeds from Alaska east through northern Manitoba to Newfoundland and south to California, Colorado, Nebraska, and Maryland. Spends winters north to southern California, the Gulf Coast, and the Carolinas. Preferred habitats include open areas near water, such as fields, marshes, meadows, shorelines, beaver ponds, and wooded swamps with standing dead trees.
http://identify.whatbird.com/obj/188/overview/Tree_Swallow.aspx
