Another group of predatory paleognaths, in their way even more terrifying than the ferocious gobblers, are the giant rocs. Rocs are a group of large to enormous predatory birds that evolved from African paleognaths in the Paleogene. Their stork-like ancestors, much like the presumed progenitors of the diablorithiforms, seem to have eaten amphibians, small reptiles and mammals. At some point, one species specialized on eating the young of the early hoplocrocs, starting the evolutionary line leading to modern rocs. Today there are several roc species in Madagascar specialized in different kinds of prey from juvenile hoplocrocs to lemurs. Rocs have also spread to Africa, leading to some new forms.