They are found in parts of Europe, Asia, Africa and were introduced in New Zealand by settlers.
Hedgehogs are nocturnal animals, often sleep during the day in a nest or under bushes and shrubs before coming out to feed at night.
Hedgehogs are not related to other spine covered creatures such as the porcupine or echidna.
The spines of a hedgehogs, are stiff hollow hairs, they are not poisonous or barbed and cannot be easily removed, they fall out naturally when a hedgehog sheds its baby spines and grows adult spines a process called "quilling".
Hedgehogs have about 5,000 to 6,500 spines at any one time.
Most hedgehog species will roll into a tight ball if threatened, making it hard for its attacker to get past the spiky defences.
A baby hedgehog is called a hoglet.
Hedgehogs communicate through a combination of snuffles, grunts and squeals.
Hedgehogs have weak eyesight but a strong sense of hearing and smell. They can swim, climb and run surprising quickly over short distances.
For their size hedgehogs have a relatively long lifespan. They live on average for 4 - 7 years in the wild and longer in captivity.
Hedgehogs in colder climates such as the UK will hibernate through winter.
If hedgehogs come in contact with humans they can sometimes pass on infections and diseases.
The hedgehogs is a pest in countries such as New Zealand where it has been introduced, as it does not have many natural predators and eats native species of insects, snails, lizards and baby ground-nesting birds.
A butterfly’s lifecycle is made up of four parts, egg, larva (caterpillars), pupa (chrysalis) and adult.
Butterflies attach their eggs to leaves with a special glue.
Most caterpillars are plant eaters (herbivores).
Fully grown caterpillars attach themselves to a suitable twig or leaf before shedding their outside layer of skin to reveal a hard skin underneath known as a chrysalis.
An adult butterfly will eventually emerge from the chrysalis where it will wait a few hours for its wings to fill with blood and dry, before flying for the first time.
Butterflies can live in the adult stage from anywhere between a week and a year, depending on the species.
Butterflies have four wings.
Butterflies often have brightly coloured wings with unique patterns made up of tiny scales.
Most butterflies feed on nectar from flowers.
Butterflies have taste receptors on their feet.
Scientists estimate that there are between 15000 and 20000 different species of butterfly.
Birdwing butterflies have large, angular wings and fly in a similar way to birds.
Monarch butterflies are known for their long migration. Every year monarch butterflies will travel a great distance (sometimes over 4000 km), females will lay eggs and a new generation of monarchs will travel back, completing the cycle