A local hunter I worked with said he thought what I’d found was a tree bear. I’d never heard of a tree bear in this region. Suddenly we had an explanation for where the thumb came from. A bear that lives in a tree forces an inner digit down so it can make an opposable grip. Normal bears cannot make an opposable grip. But if you’re spending a lot of time in the tree, you train that one thumb to grab a branch or break bamboo. So I spent two years trying to figure out whether it was a species, sub-species, or a juvenile bear.