Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Cats and dogs can hear ultrasound.
350
Cows can sleep standing up, but they can only dream lying down.
745
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
In Australia, there are spiders big enough to eat snakes.
20
Bats sleep 18-20 hours per day.
5