Classification
Biota [regio]Animalia [regnum]
Chordata [phylum]
Aves [classis]
Charadriiformes [ordo]
Laridae [familia]
Sterna [genus]
Genus Sterna contains the following taxa:
Sterna hirundo Linnaeus, 1758 [species]
Sterna paradisaea Pontoppidan, 1763 [species]