The waxwings are three species of passerine birds classified in the genus Bombycilla. They are pinkish-brown and pale grey with distinctive smooth plumage in which many body feathers are not individually visible, 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, Hypocolius (Hypocoliidae), Hylocitrea (Hylocitreidae), palmchats (Dulidae) and the Hawaiian honeyeaters (Mohoidae). There are three species: the Bohemian waxwing, the Japanese waxwing and the cedar waxwing.

The grey hypocolius or simply hypocolius is a small passerine bird species. It is the sole member of the genus Hypocolius and it is placed in a family of its own, the Hypocoliidae. This slender and long tailed bird is found in the dry semi-desert region of northern Africa, Arabia, Afghanistan, Pakistan, and western India. They fly in flocks and forage mainly on fruits, migrating south in winter. During Migration mainly found Fruit eating on Salvadora persica.