Oncidium ornithorhynchum is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Cymbidieae, subtribe: Oncidiinae,  
Genus Oncidium   section: Rostrata 
Infraspecific taxa recognized within Oncidium ornithorhynchum: infraspecific taxa
This species is found in W. South America.