Caspian tern / Raubseeschwalbe (Hydroprogne caspia)

Wikipedia: Caspian tern Source: OTHER 1200px-Sterna-caspia-010.jpg
Classification: Genus Hydroprogne; Family Gulls (Laridae)
This bird appears across the great seas in the following continents: Europe, North America, South America, Africa, Asia.
General: The Caspian tern (Hydroprogne caspia)^[2] is a species of tern, with a subcosmopolitan but scattered distribution. Despite its extensive range, it is monotypic of its genus, and has no accepted subspecies.^[3] The genus name is from Ancient Greek hudros, "water", and Latin progne, "swallow". The specific caspia is from Latin and, like the English name, refers to the Caspian Sea.^[4] [more]
Calls: Easily recognized by its very harsh calls. Sometimes likened to the sound of a plate of steel being dragged across a concrete floor. Similar in harshness to Grey Heron, but more drawn, with an accented middle; "Kraaeeet", or with a double syllable start "ka-ha-kraaaeet". Immature birds begs with a penetrating, sharp whistle. [Link]
Physical details: length=47-54 cm, wingspan=130-145 cm, weight=500-750 g
Habitats: River and lake

🔍 No documented observation