A group of pugs is called a grumble.
10
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12