Tom also provided the narration for "Amazon Claws." But not sure if this is it either, as it deals primarily with Armadillos, and the like. TV Listing QUOTE: "At one time vast creatures the size of elephants, with 30cm dagger-like claws on muscular arms, roamed the Earth. The truth behind the weirdest of the weird animals." Though birds might have been featured near the end. I personally have never seen this TV special. Just know a bit about it. "Amazon Claws" was a National Geographic
program. Hope this helps.