The Japanese night heron tends to migrate in a mixed flock of more than 1,000 other herons , including the black - crowned night heron .
It arrives at its breeding grounds in Japan between March and June , and it leaves between September and November for the Philippines .
The Japan night heron tends to migrate in a mixed flock of more than 1,000 other herons , including the black - crowned night heron .
It arrives at its breeding grounds in Japan between March and June , and it leaves between September and November for the Philippines .