This shearwater, endemic to the Cape Verde Islands, is seen in good numbers during a pelagic trip between S. Nicolau and Raso, mainly in the period spring-autumn. Raso holds its most important breeding colony. In any case, the species is considered endangered, and in the last years there are efforts to protect the breeding sites on this islet, which is a Nature Reserve. On the other hand, there are several records of C. edwardsii (even inside colonies of Cory's Shearwaters) in the Canary Islands, the Selvagens Islands and Madeira, which seems to indicate an increasing presence of this seabird in other Mid-Atlantic or Macaronesian archipelagos.