World's Smallest Seahorse: 16 mm (0.6-inch) long

World's Smallest Snake: 10.1 cm (4-inch) long

World’s Smallest Papillion: Measuring just over 5 inches

Pygmy Marmoset: Weighing just 4.2 ounces and only 5.5 to 6.3 inches in length

Pygmy Rabbit: With a body length of 9¼ to 11½ inches and weighing 13 ounces

Philippine Tarsier: Growing up to 6.30 inches

Smallest predator-The Etruscan shrew: This little animal is also known as Savi’s white-toothed pygmy shrew. It lives in southern Europe, Asia and North Africa and hunts insects and worms. Fully grown it can measure as little as 6 cm from nose to tail. Although only small, this tiny shrew has an enormous appetite and needs to eat regularly throughout the day to keep warm and survive.

Smallest bird-The bee hummingbird This tiny bird is from Cuba. It has a length of barely 6 cm when fully-grown and weighs less than the coin in your pocket. They feed by hovering whilst slurping nectar from flowers and, according to some estimates, they can flap their wings over 100 times per second. Unsurprisingly, they also lay the smallest bird eggs.

Smallest mammal-The Kitti’s hog-nosed bat: This tiny animal is found only in Thailand and due to its small size is also known as the bumblebee bat. When fully-grown it measures about 3 cm long and has a wingspan of 12 cm. Like the hummingbird, it weighs about the same as a coin. Incidentally bats are the only mammals that can fly.