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Range DescriptionPterodroma desertabreeds on Bugio in the Desertas off Madeira, Portugal. Based on surveys in 2006-2007, 120-150 pairs breed on Bugio (a lower figure than previous estimates of 150-180 from 2001), but the population appears stable (Ramirez 2008). Arecently published study has cast light on the speciess non-breeding distribution, with 17 tracked individuals remaining in the North Atlantic during the pre-laying exodus, incubation and check-rearing periods, and wintering in five areas: two off the Brazilian coast, one around the Cape Verde archipelago, one off the south-eastern coast of the USA, and one in pelagic waters in the central South Atlantic (Ramrezet al. 2013).