a tropical American wading bird with a long bill, neck, and legs, having mainly greyish plumage but showing chestnut and orange on the wings when they are spread in display.
Eurypyga helias, the only member of the family Eurypygidae
Origin:
late 19th century: so named because the pattern on the spread wings resembles a sunset
sunbittern in other Oxford dictionaries
Definition of sunbittern in the US English dictionary
