Tyrant-flycatchers (Tyrannidae)

Least Flycatcher (Empidonax minimus) - HBW 9, p. 361

French: Moucherolle tchébec German: Zwergschnäppertyrann Spanish: Mosquero Mínimo

Taxonomy: Tyrannula minima W. M. Baird and S. F. Baird, 1843, near Carlisle, Pennsylvania, USA.
Probably diverged from other members of genus c. 1·8 million years ago, in late Pliocene or early Pleistocene. Monotypic.

Distribution: C Canada (S Yukon and NW interior E to S Quebec and S Maritime Provinces) S in USA to NE Colorado, N Great Plains, New England and (in Appalachians) NW Georgia. Winters both slopes of Mexico (S from Sonora and Tamaulipas), rarely S USA, S through Central America, at least casually to Costa Rica and C Panama.