Vampire finches are an alien species of the sexes
Male coat color is predominantly black
Females are grey
Vampire finches, birds of the genus Ground Finches that live in the Galapagos Islands, are endemic to Wolfe Island and Darwin Island.
They were once thought to be a subspecies of the sharp-billed ground finches, but in a recent study by birdlife International, they found that the morphology and song between the two had become quite differentiated, so they were separately bred.
Vampire finches are best known for their unusual diet, and they occasionally suck the blood of other birds, such as the orange-billed blue-faced booby and the blue-footed booby.
The orange-billed blue-faced booby is found off the east coast of the Pacific Ocean. The overall plumage is white except for the flight feathers and tail feathers, and the area around the eyes is bluish black. The beak is long and orange.
Blue-footed are found on the eastern coast of the Pacific Ocean, from California to the Colon Islands and Peru. Brown wings are long and pointed , the tail is wedge-shaped , the neck is strong , and their feet are pale bluish green to deep aqua blue.
The vampire finches peck repeatedly on both birds with their sharp beaks until they bleed. Curiously, these two species of are not particularly concerned about the behavior of the vampire ground finches, which presumably evolved from pecking parasites.
Vampire finches also steal eggs from both species of booby, pushing them onto the rock until they are broken. Their particular diet may have evolved in response to the island's lack of fresh water, but their diet was dominated by seeds and invertebrates, as well as nectar from Galapagos cactus balls.