What is "picariae"

Picariae \Pi*ca"ri*[ae]\, n. pl. [NL., fr. L. picus a woodpecker.] (Zo["o]l.) An extensive division of birds which includes the woodpeckers, toucans, trogons, hornbills, kingfishers, motmots, rollers, and goatsuckers. By some writers it is made to include also the cuckoos, swifts, and humming birds.