Kelly the dolphin was trained to clean up her own pool by trading in a piece of litter for a fish. Kelly soon realized that she got the same reward no matter the size of the litter, so she ingeniously would take a big scrap of litter, hide it and then tear it into pieces. She would then trade each individual piece for a new fish. Basically, Kelly trained her trainers.
Goldie the eagle not only escaped his zoo, but thwarted his captors as well. He spent nearly two weeks becoming a media sensation and even the Navy was consulted to try to figure out how to capture the bird.
4. Chimp Beats a Memory Test
Scientists gave humans and a chimp a test to compare the strength of their memories. Surprisingly, the chimp beat out every single human rival.
When Japan tried to take out all of the crow nests in their city to get the crow population to move somewhere else, the crows retaliated by building a network of dummy nests to draw attention away from their actual nests.
After being captured twice, a grizzly in Glacier National Park stumbled upon a trap and decided to fight back. He destroyed all the markers that told the scientists how to get there, set off all the traps with sticks and THEN he destroyed all the cameras!