Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Tigers can see 6 times better at night than humans.
305
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
16
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20