The black-throated green warbler is a small passerine that breeds in the eastern half of North America. The breeding range includes the south eastern two thirds of Canada, the northern Great Lakes States, and the eastern United States from Maine down to Virginia and the Carolinas. Across Canada they breed in coniferous boreal forests. In the northern United States they typically breed in mixed coniferous\deciduous and in the southern portions of their range they breed in cypress swamps. This photo was taken in southern Minnesota in May during the Spring migration.
Like most warbler species teh black-throated green warbler mainly eats insects. Usually it gleans its prey from branches and leaves. It will also sometimes catch insects in flight and occasionally eat berries Since there are not insects in Canada and the northern United States during the winter these warblers migrate to southern Florida, Mexico, Central and northern Southern America. This photo was taken in southern Florida in October.