Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Denmark has twice as many pigs as there are people.
66
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11