IN late June 1956 we visited two colonies of Purple Herons (Ardea purpurea) in Holland in order to observe feeding and other behaviour for comparison with our studies in England of the Common Heron (A. cinerea). The colonies visited were at the Naardermeer reserve (10 miles S1E, of Amsterdam) and at Nieuwkoop (15 miles S . W . of the Naardermeer). At the Naardermeer we were told that there were ov...

Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now