The penguin is the only bird that can swim, but cannot fly.
1
Rats can't vomit, that's why rat poison works.
68
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
A duck's quack doesn't echo, and no one knows why.
173
An adult giraffe's tongue is 17 inches long.
28
Spiders have transparent blood.
56
The male praying mantis cannot copulate while its head is attached to its body. The female initiates sex by ripping the males head off.
85