7, see text Sternula is a genus of small white terns.
It is often subsumed into the larger genus Sterna, although the most recent changes to the AOU checklist considers it a separate genus.
[2] The genus name is a diminutive of Sterna, "tern".
[3] Listed alphabetically.
Saunders's and least terns were both formerly considered to be subspecies of little tern.