The index of the Heron Population, 1945

THE number of reports on sites occupied by Herons in 1945, which were received at the Edward Grey Institute, was 137, or 26 more than in the previous year. This increase was mainly clue to the co-opcration of those taking part in rookery censuses, a number of whom sent in reports on heronries, several of which had not been counted since 1928. We are indebted to 66 informants, of whom a number have...