white rump is a prominent field mark; bluish above (Panama; 2008-06-10)

Mangrove Swallow
Tachycineta albilinea

Native Range: Middle America

Notes: breeds in coastal mangrove regions from Mexico to Panama; compared to many other swallows this species is rather non-migratory, but it does make some seasonal movements; builds a bulky cup nest in cavities or crevices near water; flies low over the water catching insects; no sexual dimorphism.

ventral view; white underparts (Panama; 2008-06-10)

white line above and before the eye (Panama; 2008-06-10)
recently fledged juvenile (Panama; 2008-06-10)
an even younger fledgling (Panama; 2008-06-10)