Cats and dogs can hear ultrasound.
350
A 42-foot sperm whale has about 7 tons of oil in it.
209
The Basenji dog is the only dog that is not able to bark.
4
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
Rattlesnake mating sessions have been known to last more than 22 hours.
232
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
Cat families usually play best in even numbers. Cats and kittens should be acquired in pairs whenever possible!
156