The waxwings are passerine birds classified in the genus Bombycilla. They are pinkish-brown and pale grey with silky plumage, a black and white eyestripe, a crest, a square-cut tail and pointed wings. Some of the wing feathers have red tips, the resemblance of which to sealing wax gives these birds their common name. According to most authorities, this is the only genus placed in the family Bombycillidae, although sometimes the family is extended to include related taxa that are more usually included in separate families: silky flycatchers (Ptilogonatidae (e.g."Phainoptila")), "Hypocolius" (Hypocoliidae), "Hylocitrea" (Hylocitreidae), palmchats (Dulidae) and the Hawai'ian 'honeyeaters' (Mohoidae). There are three species, the Bohemian waxwing ("B. garrulus"), the Japanese waxwing ("B. japonica") and the cedar waxwing ("B. cedrorum").