The reindeer is the only mammal that can see UV light.
17
Dogs sometimes fake being sick to get attention.
26
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
The male seahorse carries babies and 'gives birth' to them instead of the female.
7