In South America, an estimated 10 percent of all birds belong to the tyrant flycatcher family. Although once fairly common in Pennsylvania, this species may or may not breed in the state today. Its white throat and breast contrast with dark olive sides. The eastern wood-pewee breeds throughout eastern North America from southern Canada to the Gulf of Mexico. It is found in all counties in Pennsylvania.
Pewees eat flies, beetles, small wasps, and moths.
They also consume elderberries, blackberries, and fruits of dogwood and pokeweed. Males defend breeding territories of two to six acres. The three eggs are incubated by the female and hatch after 12 or13 days. Both parents feed the young, which make their first flights at 14 to 18 days. Blue jays are major predators, taking both eggs and young.