This video says about itself:
July 3, 2013
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.
A team of scientists from Oxford University, the University of Vienna, and the Max Planck Institute, report in PLOS ONE a study in which ten untrained Goffin’s cockatoos [Cacatua goffini] faced a puzzle box showing food (a nut) behind a transparent door secured by a series of five different interlocking devices, each one jamming the next along in the series.
See also ScienceDaily on this.
- Study: Cockatoos can pick locks and solve complex puzzles for nuts (wired.co.uk)
- Goffin’s Cockatoos Can Solve Complex Puzzles (natureworldnews.com)
- Cockatoo cracks lock with no prior training (newscientist.com)