The reproduction biology of Black-crowned Night Heron at Lake Poyrazlar (Sakarya, Turkey). - A. Uzun, M.A. Tabur. - Berkut. 15 (1-2). 2006. - P. 94-98.
Lake Poyrazlar located in the northeast of Turkey is an important reproduction area for Black-crowned Night Heron. The research was carried out during March – December 2005. The adult individuals arriving in this area as of the beginning of April, migrate to the South in November after bringing up the chicks. The area in which 130 mates incubate, constitutes 0.6–1 % of the lake. Nesting area in the lake is 4000 m2. It was found out that the first eggs of about 31 gr. hatch at the end of a three-weeks period (21–22 days). The most important problems of the species in the region are illegal hunting, getting wood from small numbers of floodplains and people using the surroundings of the lake as picnic and camping areas. [English].
Key words: Turkey, Black-crowned Night Heron, Nycticorax nycticorax, ecology, breeding.
Address: A. Uzun, Sakarya University, Faculty of Arts and Sciences, Department of Biology, 54140, Sakarya, Turkey; e-mail: aliuzun@sakarya.edu.tr.

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