Bonin grosbeak

The Bonin grosbeak or Bonin Islands grosbeak (Carpodacus ferreorostris) is an extinctfinch. It is one of the diverse bird taxa that are vernacularly called "grosbeaks", but it is not closely related to the grosbeakssensu stricto. Many authorities place the species in the genus Carpodacus, but some place it in its own genus, Chaunoproctus. A 2013 genetic analysis found it to be a relatively basal member of the group, more derived than the common rosefinch, but with no close relatives, with an estimated divergence time from other members of the group around 12.5 million years ago.