The primitive koa finch (Rhodacanthis litotes) is an extinct species of Hawaiian honeycreeper in the subfamily Carduelinae of the family Fringillidae.

[1] An adult primitive koa finch was slender and had a total length of about 8 inches (200 mm).

[citation needed] Based on fossils, it is known that the adult primitive koa finch had a slightly curved, thick bill.

[2] The koa finches seem to have been driven to extinction by habitat destruction, and not by climatic variation nor mosquito-vectored diseases.

Koa finches were likely driven out of lowland habitat before or shortly after the time of western contact in 1778.