April 1939 – vol. 33, issue 8–349 IT has been suggested to the writer that some notes which he took chiefly in 1935, concerning summer flocking of the Common Heron (Ardea c. cinerea) should be put on record. They would have been published before, if it had not been intended to collect further data. This intention has not been realized. The habit of forming social flocks is not unknown at certain stages of the life-cycle of the Her... This article is only available to registered users.To read more, please log in or purchase a subscription.