house martin

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A swallow (Delichon urbica) of Eurasia and Africa, having blue-black plumage, a white rump and white underparts, and a forked tail.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A migratory passerine bird of the swallow family, Delichon urbicum.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun common small European martin that builds nests under the eaves of houses