These are close relatives of the true finches ( Fringillidae ) and true sparrows ( Passeridae ).
2.
The 2008 Christidis and Boles taxonomic scheme lists the estrildid finches as the separate family Estrildidae, leaving just the true sparrows in Passeridae.
3.
Locally known as the "'" sparrow " "'( true sparrows are not found on Pitcairn ), it used to be common throughout the island, where it is the only land bird.