Thanks for the compliments. By the way if you didn't notice, this was taken with a 560mm lens and there was a moat between me and the Gorilla. I believe that this is a relatively young male. He was a real ham. I photographed a series of images of him; in some he was making faces and in others was actually throwing things at the visitors to the Bronx Zoo.
Thanks for the compliment. The antics of this young "gentleman" were something to behold. I think he does things and poses for the public just to be in the spotlight and he likes to get a "rise" out of the visitors.