Barcelona Zoo. Actually not thoughtful. This chimp was busy using a tool. The twig he is holding is a 'spoon' he was using to extract honey from a small hole drilled into the structure he was sitting on. The zoo was encouraging tool use. In the wild they would break off twigs to poke into ant nests and then when they extracted the twig covered in angry ants they just pop it in their mouths for a tasty treat.