Changes in clutch size and fledging success associated with the height and distance from shore of nests were investigated in a colony of Black-crowned Night Heron at Poyrazlar Lake, Turkey. A total of 100 nests in five plots were surveyed in 2007. Nest height varied between 45–300 cm, with a tendency to be lower further from shore. Clutch size appeared independent of nest location and variable, with 37% of nests with two eggs, 32% with three eggs, 22% with four eggs and 9% with five eggs. Fledging success was approximately 67% for plot 1, nearest to shore, but increased up to 94% for plot 5, furthest from shore.