In retrospect, I should have booked just a guided nature walk at Selvatura Park. The tree top walk was beautiful and pleasant, but I didn't know what plants I was seeing. And plants was all we saw - no mammals or reptiles, and few birds or insects. I walked at about the same pace as a couple from Baltimore for about half of the route, thinking more eyes might help, but still had no luck. A zip line tour overlapped about a third of the route, and the constant noise from that probably made the chances of seeing wildlife worse.