Why did President Truman ask Congress to give financial aid to Greece and Turkey?
Actually checking the nest for the number of eggs while a finch is sitting on them can cause nest abandonment. After mating, a female finch can store sperm in her reproductive tract for up to 16 days. Female finches generally lay an egg every day, commencing between five and seven days after breeding. The average clutch consists of four to six eggs, although the overall number varies from three to eight.
Once the cockatiel pair mates, within a few weeks the female will lay eggs in the nestbox that you have provided for her. A female will lay anywhere between 2 eggs and 8 eggs. The eggs hatch anywhere from 18 days to 21 days after they are laid. You will know that the egg is ready to hatch if you notice it tilting. This happens because the air cell present in the egg begins to become large.