DistributionRead full entry
Range DescriptionOceanodroma monteiroi breeds on two islets off the island of Graciosa in the Azores, Portugal. Breeding is suspected on further islets (including some stacks off Flores and Corvo island) in the Azores, but proof is still lacking (Bolton et al. 2008, J. Bried in litt. 2010). It is thought to remain in the vicinity of the Azores during the non-breeding season, a suggestion which is supported by the analysis of carbon isotopes (Bolton et al. 2008). Although unlikely to occur eslewhere, identification amongst Madeiran Storm-petrel O. castro is difficult (W. Bourne in litt. 2012). The total population size was estimated at 250-300 pairs in 1999 (Bolton et al. 2008). Accounts from the 16th and 17th centuries of a small black and white seabird, which appear to match the breeding cycle of this species, indicate that it may have once been far more abundant (Bolton et al. 2008), however there are no recent trend data.