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Cepphus grylle (Black Guillemot) is a species of birds in the family auks. They are native to Atlantic Ocean and Arctic Ocean. They are diurnal. Individuals can grow to 58 cm. Reproduction is dioecious. They have parental care (pair provides care). They rely on flight to move around.

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EOL has data for 44 attributes, including:

Known occurrences, collected specimens and observations of Black guillemot. View this species on GBIF