Collier's New Encyclopedia (1921)/Greenlet
GREENLET, in ornithology, Vireoninæ, a sub-family of Muscicapidæ (flycatchers). They are so called from having much green or olive in the colors of their plumage. They are small birds arriving in the United States from South America and the West Indies about the month of May, and departing again in August. Some of them sing sweetly.