White-winged tern, or white-winged black tern 
(Nhàn xám, Chlidonias leucopterus or Chlidonias leucoptera)

The whiskered tern (Chlidonias hybrida) is a tern in the family Laridae.
The populations in tropical regions are resident, but European and Asian birds winter south to Africa and the Indian subcontinent.

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 Chlidonias is from Ancient Greek khelidonios, "swallow-like", from khelidon, "swallow".

Hybrida is a Latin noun meaning "mongrel" "mixed blood", often applied to children of mixed social or racial background. 
The term is associated with the Ancient Greek word hybris (ὕβρις, húbris), meaning "outrage" or "unnatural act" suggesting a hybrid was historically viewed as a violation of nature.