The oldest rocks on Rabida are about 1 million years. Some of the pyroclastic cones on the north coast are probably much younger however, as then erode quite rapidly. A salt pond formed between these cones is one of the many places where one can see flamingos in the Galapagos. These spectacular birds feed exclusively on the brine shrimp found in these saline ponds. Interestingly, their distinctive pink color comes from the shrimp themselves.
Young flamingos are white and only acquire the pink color after they begin to feed on the shrimp.