Derby

Video by Nick Moyes

This great video was made by Nick Moyes. It shows the intimate moments of the pergrine couple making new eyases.

Copulations start about 2 weeks before the female starts laying eggs. They will continue untill the egg before last is laid. From that moment on the incubationproces starts. She will refuse the mail when he tries to mate with her. Poor guy. Has to wait quite a while before she feels like it again. As an act of bonding the pair might mate when the juvi's almost fledge.

After the juvi's have left the area, the progesteron and T4 levels start to rise which triggers the molt proces.

The breeding proces is activated and maintained bij testosteron and estradiol. Molt is impossible when those androgens are at their peaklevels. So as soon as these drop and the plasma progesteron is rising molt starts. The reproduction organs shrink to threadsize. So there is no androgen production left. The hots they have now for eachother is gone by then. But the bond stays. Untill death does part them.

Watch the other video on the Derby page:

http://derbyperegrines.blogspot.com/