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The male birds have a bright green or blue head, while the female's is light brown. The Mallard lives in wetlands, eats water plants, and is gregarious. The Mallard is the ancestor of most domestic ducks, and can interbreed with other species of genus Anas. Among close relatives of the Mallard this hybridisation can cause genetic dilution, which is contributing to the decline of rarer species of ducks.
Ria Formosa Natural Reserve
Pato Real (Portuguese). The black bird in the first photo is a Eurasian Coot (Fulica atra).