
It is a species that, in comparison with other terns, is larger and more robust. It presents a light-gray plumage on top and white at the bottom, with the tips of the wings dark, the beak and feet black and a black cap that extends to the neck. Their diet is quite varied, including insects, amphibians, reptiles, rodents, birds, crustaceans and molluscs. It is a summer visitor of the Mediterranean, interior of Spain and Denmark, being scarce along the Atlantic coasts. In Portugal, its temporary extinction as breeding population may be related with the conversion of marshes to salt mines and rice paddies, and the significant increase of the disturbance of areas previously used as the Ria de Aveiro and salt marches of Comporta.
Local: El Rocio (Doñana) em Maio de 2010
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