Crow Solves Water Displacement Puzzle

A stunning moment where a New Caledonian Crow uses a tool to raise the water level, solving a simple physics problem to obtain food. This video demonstrates the incredible intelligence of these birds. This video is licensed under CC BY 2.5. Source: Movie S1 from New Caledonian Crows Learn the Functional Properties of Novel Tool Types. Authors: Taylor A, Elliffe D, Hunt G, Emery N, Clayton N, Gray R (2011), PLOS ONE. DOI:10.1371/journal.pone.0026887.