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black-crowned night heron
A stocky, short-legged heron with a black crown and back and pale gray underparts, active mainly at dusk and night, found near rivers, ponds, and city parks in Japan.
A type of 鷺 (heron) with a stocky build, black crown and back, and reddish eyes; unlike most herons, it feeds mainly at dusk and night and roosts quietly in trees by day.
Common expressions
The name comes from a legend that Emperor Daigo granted the bird the fifth court rank (五位) after it obeyed his order to be caught without struggling.