The European Magpie (Pica pica) is an infamous thief known to steal shiny objects such as gold and jewels. It is also considered one of the smartest animals on the planet and is the only non-mammal able to recognize itself in a mirror.
Smart Birdy: Along with dolphins and chimpanzees, the Eurasian magpie is right up there with the most intelligent animals on earth. The mirror test (the ability to recognize yourself in a mirror) is seen as an important test in animal intelligence, and the Eurasian magpie is the only non-mammal that has passed it. It also has one of the largest brain-to-weight ratios in the animal kingdom and has been observed using tools, working in teams, playing games, and grieving.