posted by hudi udman .
A species of bird with three toed feet feeds on worms and crawling insects. Over a period of several thousand years, the ocean level rises, and the region where the bird lives is flooded. Over several thousand years or so the birds descendant evolve webbed feet and begin to feed on fish. is this an example of gradualism or punctuated equilibrium?
gradualism because it happens gradually over a long period of time
For reference, here are some links on both: