Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Parrot parents "name" their children with a signature call.
112
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
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
The largest earthworm on record was found in South Africa and measured 22 feet.
151
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
A dairy cow can produce more milk when listening to music.
446