Caspian gull (Larus cachinnans,  Mòng biển Caspi)

The Caspian gull (Larus cachinnans) is a large gull.
The Caspian gull breeds around the Black and Caspian Seas, extending eastwards across Central Asia to north-west China.

Charadriiformes, Charadriidae, Charadrius: Late Latin word for a yellowish bird mentioned in the fourth-century Vulgate; from Ancient Greek kharadrios a bird found in ravines and river valleys (kharadra, "ravine").

Laridae:from Ancient Greek laros or Latin larus, which appears to have referred to a gull or other large seabird.

The genus name Larus is from Ancient Greek laros or Latin larus, which appears to have referred to a gull or other large seabird.

Cachinnans is a Latin word meaning "laughing," "laughing aloud," or "loudly laughing," derived from the verb cachinnare (to laugh or giggle).