Von Schrenck's bittern or Schrenck's bittern (Cò nâu, Botaurus eurhythmus)

Von Schrenck's bittern or Schrenck's bittern (Botaurus eurhythmus) is a small bittern in the family heron Ardeidae. 
This bird species breeds in southeast Siberia, east China, the Korean Peninsula and Japan and winters from the Malay Peninsula to the Greater Sunda Islands, Sulawesi and the Philippines.

Pelecaniformes, Pelecanus: Greek pelekan, pelekanos pelican.
Ardeidae, Ardea: Latin word meaning "heron".
The genus name Botaurus is derived from Medieval Latin butaurus, Bos (ox) and taurus (bull), because the bittern's call resembles the bellowing of a bull.
The specific epithet eurhythmus is from Ancient Greek eurhuthmos meaning "graceful" or "well-proportioned".
In Greek, eurhythmics means "good rhythm" or "good flow," combining "eu" (good) and "rhythmós" (rhythm, measured flow). It signifies a harmonious and well-proportioned rhythm or movement. The term is also understood to mean "rhythmic order" or "graceful motion". 
The term reflects a balance and harmony in both musical and physical expression.