Incubation consists of Temperature, Thrning and Humidity. I ruled out temperature and
humidity as much work has been done on temperature and humidity is easy to control. So tumin
was looked at in detail. The results were very interesting indeed. If Night Heron eggs incubated in
the traditional way, tumed 24 times a day on tilting trays, very slow and limited vein growth and
dead in shell. On rollers turned 24 times a day on their side, better vein growth even to complete
vein growth but late in incubation and hatching success still very poor. If on rollers t.:lmed 24
times a day and also hand tumed 7 times a day then success. Complete vein growth before 6OVo of.
the incubation period and more importantly successful hatchings.