Good morning meshers,,,,leo we have some fun facts about animals..DID YOU KNOW THAT...... Hummingbirds are the only birds that can fly backwards. Crocodiles cannot stick their tongue out. Starfish do not have a brain. Slugs have 4 noses. Only female mosquitoes bite. Polar bear skin is black! The only mammal capable of flight is the bat. A newborn kangaroo is the size of a . lima bean.