New York Natural Heritage Program
Kentucky Warbler
Geothlypis formosa (Wilson, 1811)
Kentucky Warbler U.S. Fish and Wildlife Service
Family: Wood-Warblers (Parulidae)

State Protection: Protected Bird
Defined as a Protected Bird by New York State law. This species may not be hunted or taken at any time in New York.

Federal Protection: Migratory Bird Treaty Act
The Migratory Bird Treaty Act implements various treaties and conventions between the U. S. and Canada, Japan, Mexico and the former Soviet Union for the protection of migratory birds. Under this Act, taking, killing, or possessing migratory birds, including nests or eggs, is unlawful unless specifically permitted by other regulations.

State Rarity Rank: S2B
A State Rarity Rank of S2B means: Typically 6 to 20 breeding occurrences or very limited breeding acreage in New York State.

Global Rarity Rank: G5
A Global Rarity Rank of G5 means: Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.

Did you know?
Gibbs (1988) found that unmated males sing more than five times as often as paired males.

State Ranking Justification [-]
New York is the northern-most extent of the Kentucky Warbler range. During the second Breeding Bird Atlas (2000-2005), Kentucky Warblers were reported in 11 blocks, with six probable or confirmed breeding blocks (McGowan and Corwin 2008). In contrast, the first Breeding Bird Atlas (1980-1985) reported Kentucky Warblers in 39 blocks, with 27 probable or confirmed breeding blocks (Andrle and Carroll 1988). When comparing the two breeding bird atlases, it appears the population is declining. Populations appear to fluctuate in the state.

Short-term Trends [-]

Long-term Trends [-]