Bulwer’s petrel captures from 2007 to 2018 specifying the reproductive performance/status of the individuals (1=unknown reproductive performance, 2=successful breeder, 3=failure at incubation, 4=failure at chick-rearing, 5=non-breeder and 6=breeder with unknown reproductive performance), their colony (Vila or Montaña Clara) and their sex (0=not sexed, 1=male and 2=female). Data from Vila islet in Azores Islands were collected from 2007 to 2012 and in 2016; data from Montaña Clara islet in Canary Islands were collected from 2010 to 2018.