I'll admit my faults as an artist. However, rule of cool is a thing. Thank you for the cool bird fact.

well, you don't need to leave bird anatomy behind to get cool thumblike anthropomorphization! my upcoming avian redesign is heavily inspired by the hoatzin, whose juveniles have 2 claws per wing that allow them to clamber about trees before gaining flight, and the extinct archaeopteryx' 3 claws