Because these birds don’t breed very readily in captivity, we want to maximize the output of any breeding female. So, we know that they lay a clutch of two eggs. What we’re able to do is manipulate that clutch with dummy eggs to have them keep producing more eggs. For most pairs we get more than two eggs. Sometimes we get three, four, five, up to seven or eight eggs out of a single female. And we do that by removing the egg as its laid.

