This i my Peru. if you google erythinus erythrinus, or search the forum it should be easy to find a pic. Sorry I don't have one to hand without robbing it from somebody else.
There is a strong difference between the two, I have some pics of my Peru in this thread aswell.
Usually happens before feeding time as everyone gets a bit boisterous and it always ends in tears so I'm now alternating feeding time to reduce the silliness.
Oh, and i used to have a black background but it made it impossible to photograph the big fella!