Sand Martin
in ornithology, the Hirundo riparia, called also the bank martin and bank swallow; length about six inches; upper parts and a broad band across the breast grayish brown, lower parts brownish white. It makes its nest in the steep banks of rivers, sand pits, quarries, and sea banks, and deposits four or five white eggs. It breeds in N. latitudes, but goes S. in autumn, returning again in spring.