Gull-billed tern / Lachseeschwalbe (Gelochelidon nilotica)

Wikipedia: Gull-billed tern Source: OTHER 1200px-Gelochelidon_nilotica_vanrossemi.jpg
Classification: Genus Gelochelidon (Gelochelidon); Family Gulls (Laridae)
This bird appears across the great seas in the following continents: Europe, North America, South America, Africa, Asia.
General: The gull-billed tern (Gelochelidon nilotica), formerly Sterna nilotica,^[2] is a tern in the family Laridae. The genus name is from Ancient Greek gelao, "to laugh", and khelidon, "swallow". The specific niloticus is from Latin and means of the Nile.^[3] The Australian gull-billed tern was previously considered a subspecies. [more]
Vocalization: Quite vocal and easily distinguished from most congeners. Mewing and sharp in tone, but not rattling or raucous like most terns. Other variants are series of "ke-ke-ke-ke", or the mewing sounds. [Link]
Calls: Most typical call is a disyllabic, mewing "ke-waat", with an upward inflection. [Link]
Physical details: length=35-38 cm, wingspan=100-115 cm, weight=190-260 g

🔍 No documented observation