Geographical distribution of Scopoli's Shearwater Calonectris diomedea.
BirdLife International. 2017. Calonectris diomedea (amended version of 2016 assessment). The IUCN Red List of Threatened Species 2017: e.T45061132A111157821. https://dx.doi.org/10.2305/IUCN.UK.2017-1.RLTS.T45061132A111157821.en. Downloaded on 26 June 2018.
Cephas