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O nosso especialista diz… "Embora receba esse nome por ser frequentemente encontrado alimentando-se ao redor de algas marinhas, na Antártida tornou-se um especialista em alimentar-se de lapas! Na maré baixa, é comum vê-los mergulhando para arrancar as lapas das rochas. Durante as excursões em terra, pode também encontrar um 'midden' de lapas, onde as aves se reúnem para comer as lapas que coletaram e depois descartam as conchas."
A gaivota-de-patas-negras é a única espécie de gaivota encontrada na Antártida. Também conhecida como gaivota-dominicana e gaivota-de-dorso-preto-do-sul, está amplamente distribuída nos oceanos do sul e é uma das espécies que certamente encontrará durante o seu cruzeiro de expedição à Antártida!
Semelhante em tamanho e aparência às gaivotas-de-dorso-preto encontradas mais ao norte, a gaivota-de-patas-negras mede tipicamente cerca de 60 cm de comprimento, com uma envergadura de 1,4 m. As asas e o dorso são pretos ou cinza-escuros, enquanto o restante das penas é de um branco brilhante. O bico é amarelo, com uma mancha laranja distinta na parte inferior.
Como a maioria das gaivotas, as gaivotas-de-patas-negras são omnívoras e alimentam-se do que conseguirem encontrar! Os seus bicos são poderosos e rapidamente consomem qualquer carcaça que encontrem. Também podem capturar presas pequenas, caso surja a oportunidade, e frequentemente são encontradas ao redor de colônias de nidificação de outras aves, onde podem capturar filhotes vivos deixados sem vigilância, além de se alimentarem de qualquer um que venha a perecer.
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