Earthworms live in the soil and feed on all sorts of things like rotting leaves, bacteria, and fungi. They are invertebrates (have no backbone) and also have no eyes.
You can find earthworms almost all over the world, but not in places where the ground is always frozen, or always very wet, or always very dry.
The longest earthworm ever recorded was found in South Africa - it was 6.7m long!
2. Guppy
Answer: 0 legs
Guppies are small colourful tropical fish, originally from South America, and are often kept in home aquariums. Another name for them is "rainbow fish".
The male guppy is more brightly-coloured than the female, and has patterned fins and ofteb a large, flowing fan-shaped tail.
3. Rattlesnake
Answer: 0 legs
Rattlesnakes are reptiles and are found in North and South America. They hunt small animals like birds and mice by biting and injecting venom through their fangs.
The rattle is at the end of the tail - when the snake is alarmed, special muscles shake the tail end which makes the rattling noise. You cannot tell a rattlesnake's age by counting the rattles, as pieces frequently break off.
4. Zebra shark
Answer: 0 legs
Zebra sharks are fish - they live around coral reefs in tropical areas of the Pacific and Indian Oceans.
Young zebra sharks are usually dark coloured with lighter vertical stripes and spots a bit like a zebra. This pattern also makes them look similar to some venomous sea snakes, so it provides some protection from predators.
5. Arctic skua
Answer: 2 legs
The Arctic skua is a seabird. It feeds mainly on fish which it steals from other birds such as gulls and terns, but also on eggs and chicks of other bird species, and on dead birds and mammals.
It breeds in the far north of America, Europe and Asia (for example Alaska, Greenland, Norway and Russia), but migrates in the winter to South America and South Africa.
6. Tyrannosaurus rex
Answer: 2 legs
Tyrannosurus rex, or T-rex, was a meat-eating dinosaur that lived millions of years ago in what is now North America. It walked and ran on its hind limbs, and its front limbs were small and more like arms than legs.
It had 50-60 very sharp teeth about the size of a banana!
7. Cassowary
Answer: 2 legs
Cassowaries are flightless birds (like ostriches) that look like an emu with a colourful neck and head wearing a helmet. They come from the tropical forests of New Guinea and northwestern Australia.
Wild cassowaries can live for up to 20 years; in zoos, they have been known to live for 40 years.
8. Yellowhammer
Answer: 2 legs
The yellowhammer is a small yellow and brown bird found in much of northern Europe. It is also found in Australia, New Zealand, the Falkland Islands, and South Africa, where it was taken by European settlers.
The yellowhammer's song is a rapid twitter that has the same rhythm as the phrase "A little bit of bread and no cheeeeese!", and an old name for the bird is "scribble lark" because its eggs look as if someone has scribbled all over them.
9. Ferret
Answer: 4 legs
The ferret is a carnivorous mammal. It is a small member of the weasel family and is a domestic animal, not a wild animal. Many people keep ferrets as pets as they are intelligent, curious and playful.
Ferrets were probably domesticated about 2500 years ago and were used for hunting small animals like rabbits and rats.
10. Snow leopard
Answer: 4 legs
The snow leopard is one of the family of big cats, and is found in the high mountains of places like Nepal, Afghanistan and Mongolia.
Snow leopards are very rare. They eat things like wild antelope and wild goats, but also smaller animals like voles.
11. Meerkat
Answer: 4 legs
Meerkats are small mammals of the mongoose family. They live in family groups in the drier areas of southern Africa and dig burrow systems in the earth. Meerkats are about 24-36cm long.
Although meerkats have 4 legs, they often stand up on their 2 hind legs when they are guarding their burrows.
12. Tree frog
Answer: 4 legs
Tree frogs are amphibians and can be found all over the world except for Antarctica. They live in places like tropical rainforests, ordinary wet forests and wetlands. Not all of them live in trees all the time - they just spend most of their time there.
They have little discs at the ends of their toes to help with gripping and climbing. Most tree frogs are small (under about 8cm long), but some species can grow up to 14cm.
This quiz was reviewed by FunTrivia editor MotherGoose before going online.
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