tattler

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. One who tattles.
2. n. Any of several shore birds related to and resembling the sandpipers, especially one of the genus Heteroscelus that is noted for its loud cry.

Century Dictionary and Cyclopedia

1. n. One who tattles; an idle talker; a prattler; a telltale.
2. n. In ornithology, a bird of the family Scolopacidæ and genus Totanus in a broad sense; one of the Totaneæ; a horseman or gambet: so called from the vociferous cries of most of these birds. There are many species, of several genera, of all parts of the world; and some are noted for their extensive dispersion, as the wandering tattler of various coasts and islands of the Pacific. The word is chiefly a book-name, as those tattlers which are well known in English-speaking countries have other vernacular names, as yellowlegs, yellowshank, redshank, greenshank, willet; and some of them are called sandpipers, with or without qualifying terms. See the distinctive names (with various cuts), and also Scolopacidæ, sandpiper, snipe, Totanus. and cuts under greenshank, redshank, Rhyacophilus, ruff, Tringoides, Tryngites, willet, and yellowlegs.

Wiktionary

1. n. One who tattles (notifies authorities of illicit behavior) or is inclined to do so; a tattletale.
2. n. A device fitted to a vehicle to measure mileage etc.

GNU Webster's 1913

1. n. One who tattles; an idle talker; one who tells tales.
2. n. Any one of several species of large, long-legged sandpipers belonging to the genus Totanus.

WordNet 3.0

1. n. any of several long-legged shorebirds having a loud whistling cry
2. n. someone who gossips indiscreetly