Grand Cayman Bullfinch

The Grand Cayman bullfinch is 14 to 15 cm (5.5 to 5.9 in) long and weighs about 16 to 19 g (0.56 to 0.67 oz). The species is sexually dimorphic. It has very robust bill with a markedly curved culmen. Adult males are dull black except for white edges on the flight feathers that show as a wide patch on the closed wing; its underwing coverts are also white. Their tail is dull black with faint whitish tips on the feathers. Adult females have a blackish slate head and upperparts. Their throat, breast, and upper belly are blackish gray and their lower belly and flanks brownish olive-gray. Both sexes have a dark brown iris, a silvery gray bill, and black legs and feet. In contrast, Cuban bullfinches have a black bill. Males are glossy black with less white on the wings and females are overall a grayish black.

The Grand Cayman bullfinch is found only on Grand Cayman. A sighting on Little Cayman attributed to the species is thought "as likely (if not more likely) to have involved the now-split Cuban Bullfinch". It inhabits a wide variety of landscapes including semi-deciduous and evergreen woodlands, pine forest, shrublands, mangroves, and around human habitations.

The Grand Cayman bullfinch feeds on fruits, seeds, flowers, and insects. It usually forages in pairs, from near the ground to the forest canopy.