Check out the above photograph (click to enlarge). The bird on the left is a juvenile Golden Eagle, the bird on the right an adult. The juvenile looks like it has wool socks on, the adult has feathered legs but the feathers are dark...is this an age difference trait? I have seen this before on juveniles but would need to see a large sample size up close to know for sure if only juveniles show these whitish "socks". Either way, it is kinda neat looking.