The Bonin greenfinch (Chloris kittlitzi), also known as the Ogasawara greenfinch, is a small passerine bird in the finch family Fringillidae that is endemic to the Ogasawara Islands of Japan, where it is found on the Bonin Islands and Volcano Islands. It was formerly considered a subspecies of the grey-capped greenfinch (C. sinica) and some authorities consider it as such, but a 2020 analysis found it likely to represent a distinct species that diverged from C. sinica about 1.06 million years ago, and the International Ornithological Congress now recognizes it as such, making it the eleventh endemic species in Japan (alongside the Copper pheasant (Syrmaticus soemmerringii), Okinawa rail (Hypotaenidia okinawae), Amami woodcock (Scolopax mira), Japanese green woodpecker (Picus awokera), Okin