We had two peahens hatch out five babies last spring. However, two birds disappeared over the winter. Now this spring all the birds look alike so we do not know if the two that disappeared were young ones are the older hens. Can we sex them somehow and find out or do we just wait and see if any of them lay this spring? Also how can you sex young birds as they all look alike except that some do not have the "fan" of feathers on top of their head- is that significant? Is it also true that both male and females are not mature until the age of two years? Enough questions,I await a reply. Thanks.