BeRMS (2025). Sulidae Reichenbach, 1849. Accessed at: https://marinespecies.org/berms./aphia.php/aphia.php?p=taxdetails&id=136994 on 2025-05-08
VLIZ Belgian Marine Species Consortium (2010 onwards). Belgian Register of Marine Species. Sulidae Reichenbach, 1849. Accessed at: https://marinespecies.org/berms./aphia.php/aphia.php?p=taxdetails&id=136994 on 2025-05-08
basis of recordvan der Land, J. (2001). Tetrapoda, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i> 50: pp. 375-376 (look up in IMIS) [details]
additional sourceHarrison, P. (1985). Seabirds: an identification guide. Revised edition. Christopher Helm Publisher. A & C Black: London, UK. ISBN 0-7136-3510-X. 448 pp. (look up in IMIS) [details]
Present Inaccurate Introduced: alien Containing type locality