A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
52
At one 'feeding', a mosquito can absorb one and a half times its own weight in blood.
-1
The Jewel Wasp injects a drug into a cockroach’s brain, turns it into a zombie, rides it like a horse back to its burrow, and then lets its hatched larvae feed on the cockroaches body from the inside.
6
Crocodile babies don't have sex chromosomes; the temperature at which the egg develops determines gender.
45
A moth has no stomach.
23
Whales and dolphins can't taste anything other than salt.
11
Cattle are the only mammals that pee backwards.
33