Squirrels: more interesting than their size suggests
Squirrels may be small, but are extremely complex creatures.
Squirrels will actively try to deceive people, pretending to hide their nuts when they think they are being watched, but actually keeping them hidden in their mouths. They have different calls for different things and can learn by watching other species, even humans. Physically they have a number of exceptional features, like the ability to jump ten times their body length.