Breeding habitat includes open deciduous woods and shrublands in southern Ontario, the eastern and southwestern United States, and Mexico. Though gnatcatcher species are common and increasing in number while expanding to the northeast, it is the only one to breed in Eastern North America. They migrate to the southern United States, Mexico, northern Central America.
They forage actively in trees or shrubs, mainly eating insects, insect eggs and spiders. They may hover over foliage while snatching prey (gleaning), or fly to catch insects in flight (hawking). The tail is often held upright while defending territory or searching for food.
(* Image from Wikipedia)