When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
Mosquitoes don't just bite you, they also pee on you.
11
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27