There are two groups of Old World vultures. The first group has the Egyptian vulture, bearded vulture, and palm-nut vulture. Some scientists put this group into a separate subfamily called "Gypaetinae", which means "eagle-vultures". It is related to the group of bazas, honey-buzzards and cuckoo-hawks, which are much smaller birds. The second group has all the other species. It is related to the booted eagles, which is a group of eagles that have feathers on their legs down to their toes. 