Life cycle of a butterfly egg Larva (Caterpillar) adult pupa

Egg When a female butterfly is ready to lay its eggs, it flies around to find right plant. It flies from the plant to plant to feed on the nectar of flower. Back

larva Each egg hatches into a larva. The larva is the young of an insect. The larva of a butterfly has a special name. It is called a caterpillar. Back

pupa The caterpillar grows very fast. In just a few days, it is too big for its skin. It grows a new skin and sheds the old one. This is called moulting. Back

adult When the case finally breaks open, a beautiful butterfly comes out of it. The butterfly spreads its wings to dry. Then it take off on its first flight. Back

Fish Medium Depths There is less light at medium depths, and larger creatures like whales and sharks live here. Shoals of fish move from this to other regions, depending on the food available.

Bird Blue JayCommon in woodland and parkland across central and eastern North America, Cyanositta cristata is about 30cm(12in) long. This bird is found in pairs or small groups, and is always noisy, with a distinctive "peeah peeah" call. It uses mud to build its nest.

mammal Arboreal Mammals Members of the order primates - prosimians, monkeys and apes - are a diverse group that form highly complex social units. Primates mostly inhabit tropical rainforests, and their dexterous prehensile (grasping) hands and feet are an adaptation to a largely arboreal lifestyle. Primates form a highly varied group, with members as diverse as mouse lemurs, which may weigh only 35g and gorillas, which can reach over 200kg. Most species have flat nails on the fingers and toes - only a few have claws - and the big toe always has a nail. Most have a tail, except the apes. Apart from some toothed whale species, the higher primates have the largest brain relative to body size of all the mammals, which helps explain their high intelligence. Most primates spend at least part of their life in trees and have adapted accordingly. To provide a strong hold on branches, the big toe is separated from the other toes in all species except humans, and the thumb is always separated from the fingers, although it is fully opposable only in apes and in some Old World monkeys. The arm and wrist bones are not fused, which increases dexterity. Some species have a long, prehensile tail, used as a 'fifth limb'. Aquatic Mammals Three groups of mammals have adapted to aquatic life, developing a streamlined body and the ability to stay underwater for long periods (although all of them return to the surface to breathe). The largest group are whales and dolphins. Like whales, seals and sea lions rely on subcutaneous fat to keep warm, but they have retained their fur, which is kept waterproof by an oily secretion. Sirenians (the manatees and dugong) live in warm coastal waters and estuaries and are the only herbivorous aquatic mammals.Cetaceans Cetaceans - whales, dolphins, and porpoises - are perhaps the most specialized of all mammals, with their fish-shaped, hairless body, a flipper-like front limb, and vestigial back limbs (located within the body wall). However, they are true mammals: they breathe air with lungs, and they have mammary glands with which they suckle their young. Unlike other river dolphins, this species lacks a proper dorsal fin and in its place has a low back hump. Known for its slow, apparently lethargic lifestyle, the Amazon river dolphin usually lives alone or in twos.