Sterna is a genus of terns in the bird family Laridae. The genus used to encompass most "white" terns indiscriminately, but mtDNA sequence comparisons have recently determined that this arrangement is paraphyletic. It is now restricted to the typical medium-sized white terns occurring near-globally in coastal regions.[1]

Common tern by the River Thames
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Laridae
Tribe: Sternini
Genus: Sterna
Linnaeus, 1758
Type species
Sterna hirundo
Linnaeus, 1758

13, see text