"Black Tern" is a medium sized tern, whose head and belly turn white in winter. His tail is moderately forked.
"Black Terns" breed from British Columbia eastward to New Brunswick and south to California on the West Coast and New York on the East.
Calls or song.
When they are disturbed the "Black Tern" emit a sharp "kreek".
Population and distribution.
These birds inhabit freshwater marshes and lakes. In the winter and during migration they can be found on sandy beaches south of the U.S. border.
The "Black Tern" breeds in colonies, making nests in shallow water, as opposed to other terns, who nest in scratches they make in sand dunes.
Birds in the same Family: