Grand Cayman bullfinch
The Grand Cayman bullfinch is a threatened bird endemic to the island of Grand Cayman. It is usually treated as a subspecies of the Cuban bullfinch, but some authorities separate it. It can be distinguished from the Cuban bullfinch by its slightly larger bill size and the much paler coloration of the female bird. It is the only bird species endemic to the Cayman Islands since the extinction of the Grand Cayman thrush, though several bird subspecies are also endemic. Its population is declining due to invasive mammals. Habitat fragmentation may also be a potential major risk, though currently this is very low.
