Hyogo Prefecture is well known for having many species as well as individuals of the heron tribe. Egretta alba modesta is the rarest species among three white herons those breed in Japan but it is by any means rare in this prefecture. Its occurrence is often confused with Egretta i. intermedia.
Gives detailed account of migration, measurements of birds, colour of soft parts, voice, feeding and breeding habits, differences between it and Egretta i. interemedia, environment of colonies, eggs and young.