The New Student's Reference Work/Vireo
Vir′eo or Green′let, a class of birds somewhat like the shrikes. They are found in America, migrating usually in May from South America to the United States. They are very destructive to insects, and are sweet singers. The color usually is a shade of green, with white markings. They build their nests in trees and bushes, hanging them from twigs and making use of pieces of hornet-nests, flax and paper, which they glue together with the silk from the caterpillar or the saliva of birds. The nests are so strong that other birds and even mice will use them after they are deserted by their owners. The red-eyed vireo, the white-eyed vireo, the solitary vireo and the Whip-Tom-Kelly are varieties found in the United States.