Estrildidae, songbird family, order Passeriformes, consisting of approximately 140 species of waxbills and other small finchlike birds of the Old World, many of which are favourite cage birds.

Members range in size from 7.5 to 15 cm (3 to 6 inches) long. They have short, stout bills and short legs and display a wide variety of colours and patterns. These gregarious ground feeders search for seeds, berries, and insects. Waxbills are poor singers, their songs being interspersed with chirps, buzzes, and chatters; but their bright colours, liveliness, and adaptability recommend them to bird fanciers. The family’s members include mannikins and munias (Lonchura), cordon bleus and grenadiers (Uraeginthus), fire finches (Lagonosticta), waxbills (Estrilda), parrot finches (Erythrura), and negro finches (Nigrita). Some classifications also include the whydahs.

The waxbills are sometimes listed as a subfamily (Estrildinae) in the weaverfinch family (Ploceidae). The Estrildidae family belongs to the songbird suborder (Passeri).

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