Well, Parakeets breed in the beginning of Spring and Fall. As an example, I'm going to use Fall. On the first day of Fall (September 23 *2010*), would be the best time to put in the nest box. Maybe...
It takes 18 days of incubation so not 18 days from when they where born but 18 days after the mom starts to sit on the eggs. Typically new hens will start to sit on the eggs with the arrival of a...
If she sits on it right when she lays it 18 days if she sits on it after the second one is laid then 20 days for the first to hatch and 18 for the second one to hatch. That's just an average but...