Ducks are social birds who live in waterways such as ponds and streams, with a maximum lifespan of about 20 years.

Sensitive, intelligent elephants are the world’s largest land mammal (by weight) and a living link to long-extinct species like the woolly mammoth.

Combine a bulbous snout with a prominent jaw, a body like a beer keg set on four stubby legs, and you have a hippopotamus.