The second requirement for the existence of two species together is that they must not compete for the same food If they tend to eat similar food The onn that is better adapted to obtain that food will usually elimippate the other In those cases when two closely related species live side by side Investigation show that then have in fast evolved difference in diet Thus the beak difference among
The virious Galapagos finchs are not just an insular curiositybut are adapted to differences in diet and are an essential factor in their persistence together It used to be supposed that related species of bird overlapped suqqest that many of the bird have similar habits But having established the principle of food differentiation in dawin’s finch