Observations and experiments on egg-laying in the black-headed gull (Larus ridibundus L.)

Barth, 1955, Egg-laying, incubation and hatching of the Common gull (Larus canus), Ibis, 97, 222, 10.1111/j.1474-919X.1955.tb01909.x Coulson, 1956, A study of colonies of the Kittiwake, Risa tridactyla (L.), Ibis, 98, 63, 10.1111/j.1474-919X.1956.tb03030.x Darling, 1938 Davis, 1942, Number of eggs laid by Herring gulls, Auk., 59, 549, 10.2307/4079464 Dwight, 1925, The gulls (Laridae) of the world, Bull. Amer. Mus. nat. Hist., 52, 63 Goodbody, 1955, The breeding of the Blackheaded gull, Bird Study, 2, 192, 10.1080/00063655509475830 Haverschmidt, 1931, On the breeding of the Black-headed gull (Larus r. ridibundus L.) in first summer plumage, Ardea, 20, 147 Kirkman, 1940, Black-headed gulls incubating for 75 days, Brit. Birds, 34, 22 Koehler, 1940, Instinkt und Erfahrung im Brutverhalten des Sandregenpfeifers, Sitzungsber. Ges. Morphol. Physiol. Munchen, 49, 4 Marchant, 1951, The status of the Black-headed gull colony at Ravenglass, Brit. Birds, 45, 22 Noll, 1931, Neue biologische Beobachtungen an Lachmöven (Larus argentatus), Beitr. Fortpfl. Vogel, 7, 7 Oordt, 1934, Die hormonale Wirkung der Gonaden auf Sommer und Prachtkleid II. Ein Fall einer teils im juvenilen, teils im adulten Sommerkleide brütenden Lachmöve, Zool. Anz., 106, 135 Paludan, 1951, Contributions to the breeding biology of Larus argentatus and Larus fuscus, Vidensk. Medd. fra Dansk. naturh. Foren., 115, 1 Salomonsen, 1939, Oological studies in Gulls. 1. Egg-producing power of Larus argentatus Pont, Dansk. Ornith. Foren. Tidsskr., 33, 113 Stresemann, 1927, 7 Tinbergen, 1953 Witherby, 1938