vesper sparrow

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A North American sparrow (Pooecetes gramineus) having white markings on its outer tail feathers.

Century Dictionary and Cyclopedia

1. n. The vesper-bird.

GNU Webster's 1913

1. adj. the grass finch. See under Grass.

WordNet 3.0

1. n. common North American finch noted for its evening song