A partial premaxilla of a Great Auk Pinguinus impennis was recovered from Middle Pleistocene deposits on Green Island, Bermuda. These deposits formed during the interglacial sea-level rise of Marine Isotope Stage 11 and are about 400 000 years old. This constitutes the first record of Great Auk for Bermuda and probably represents a bird that died at sea and was washed ashore.