What is the meaning of Vireo?

Any of a number of small insectivorous passerine birds, of the genus Vireo, that have grey-green plumage.

Any bird of the family Vireonidae, which includes vireos, shrike-vireos, greenlets, and peppershrikes.

vireo (bird of the genus Vireo)

to be verdant, green; to sprout new green growth

to flourish; to be lively, vigorous

a bird, probably the greenfinch

Source: wiktionary.org