yellow-breasted chat

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A large North American warbler (Icteria virens) having a bright yellow throat and breast, noted for its highly variable song.

Wiktionary

1. n. A large yellow-colored songbird found on the American continent, scientific name Icteria virens.

WordNet 3.0

1. n. American warbler noted for imitating songs of other birds