WW, I typed animal characteristics into Google and it gave me nearly 4½ million hits; then I typed unique animal characteristics and still got over a million. I can't tell from a glance at the first page whether any of them are just what you're looking for. I have an idea that there is an idea somewhere in the back of my mind; if it forms into something act-on-able, I'll give it a try.
Meantime--if you're truly just after the information, is there an expert you could call? Someone at a university, or a zoo, maybe?