Cows can sleep standing up, but they can only dream lying down.
745
A group of unicorns is called a blessing.
304
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Domestic pigs average a top speed of about 11 miles per hour.
182
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
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