Cockatoos solve complex puzzles, pick five locks to get food

A species of Indonesian parrot can solve complex mechanical problems that involve undoing a series of locks one after another, revealing new depths to physical intelligence in birds. Cockatoos 'pick' puzzle box locks Explorative Learning and Functional Inferences on a Five-Step Means-Means-End Problem in Goffin's Cockatoos (Cacatua goffini) - note: this is boring technical gobbledegook