Pigs Neat human trick:
As it turns out, being piggy is actually a pretty smart tactic — pigs are probably the most intelligent domesticated animal on the planet. Although their raw intelligence is most likely commensurate with a dog or cat, their problem-solving abilities top those of felines and canine pals.
One study showed that domestic pigs can quickly learn how mirrors work and will use their understanding of reflected images to scope out their surroundings for food. The researchers cannot yet say whether the animals realize that the eyes in the mirror are their own, or whether pigs might rank with apes, dolphins and other species that have passed the famed “mirror self-recognition test” thought to be a marker of self-awareness and advanced intelligence.
In a 1990s experiment, pigs were trained to move a cursor on a video screen with their snouts and used the cursor to distinguish between scribbles they knew and those they were seeing for the first time. They learned the task as quickly as chimpanzees.