- 5.1 in
- 7.1–8.7 in
- 0.4–0.5 oz
- Paruline du Kentucky (French)
- Chipe patilludo (Spanish)
- Unlike most songbirds, a male Kentucky Warbler appears to sing only one song type. He will sing the same one throughout his life. Although counter-singing males do not match each other's song types the way many bird species do, a male may match the pitch of a competitor's song.
May be declining slightly in much of range.
- McDonald, M. V. 1998. Kentucky Warbler (Oporornis formosus). In The Birds of North America, No. 324 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA.