It was great to see this update from the Peregrine Fund on their web site and to have what Robin reported sometime ago about one of the birds having a band on (see Boise Falcon News 03/26/2013) confirmed, although the number can not be determined. Here is their update. Keep Looking Up! Please cast your VOTE above. Thanks.
Can you tell the male and female apart? It can be tricky unless the birds are standing side by side – in that case, the female will be noticeably larger than the male. This characteristic, which is common to most birds of prey, is called “reverse sexual size dimorphism.”
Also, the colors of a female’s feathers are slightly duller than a male’s but that is hard to see on the camera. Perhaps the best way to tell the difference between these two birds is by looking for distinguishing patterns and markings on their heads.
At least one of the birds has an identification band on one of its legs. The numbers are not visible on the webcam but if they were, they would tell us the sex of the bird and when and where it was banded. Band numbers are kept at a central registry so that if any banded bird is found or captured, the number can be tracked. Scientists use this information to research topics like raptor survival, behavior, and migration patterns.” [The Peregrine Fund website April 24, 2013]