It's a Mathematician. Pigeons are better at the Monty Hall Problem than humans! (This is probably because pigeons don't have the internet, and can just figure the problem out in their own time rather than threatening each other with knives over whether to switch or stick. True story.)

Are Birds Smarter Than Mathematicians? Pigeons (Columba livia) Perform Optimally on a Version of the Monty Hall Dilemma

The “Monty Hall Dilemma” (MHD) is a well known probability puzzle in which a player tries to guess which of three doors conceals a desirable prize. After an initial choice is made, one of the remainin...