Rattlesnake mating sessions have been known to last more than 22 hours.
232
Squirrels forget where they hide about half of their nuts.
698
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
Drivers kill more deer than hunters do.
660
Tigers can see 6 times better at night than humans.
305
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9