The vegetation of Portugal is a mixture of Atlantic, or European, and Mediterranean (with some African) species. North of the Mondego valley, 57 percent of the plants are European species (more than 86 percent in the northern interior), and only 26 percent Mediterranean; in the south the proportions are 29 and 46 percent, respectively. The fauna in Portugal is again a mixture of European and North African types. As in Spain, the wild goat, wild pig and deer are found in the Portuguese countryside. The Wolf survives in the remote parts of Serra da Estrela, and the Lynx in Alentejo. The fox, rabbit and Iberian hare are ubiquitous. Bird life is rich because the peninsula lies on the winter migration route of western and central European species. Fish are plentiful in the Atlantic waters of mainland Portugal, especially the European sardine. Crustaceans are common on the northern rocky coasts.