Class 7 Science
Penguin: Penguins also live in the Polar Region. Penguins are of white colour with black back. They have thick layer of fat under their skin. This protects them from extreme cold.
Birds: There are many types of birds found in Polar Regions. They fly to the warm regions during winter to survive. Long distance travel, in search of favourable climate, is called migration.
Some migratory birds are known to travel as long as 15000 km to keep them survive in opposite climatic conditions. Arctic tern is known to be the longest traveler among the migratory birds.
Apart from birds, many fish and mammals also migrate to other places in such opposite climatic conditions.
In India, Tropical Rainforests are found in the Western Ghats and in Assam. Rainforests are also found in Southeast Asia, Central America and Central Africa.
Rainforests have plenty of food which supports variety of life. Many animals are found in the rainforests, e.g. leopard, elephant, snakes, tigers, monkey, buffaloes, frogs, apes, lizards, many types of birds, insects, etc.
In spite of plenty of food, there is a high level of competition for survival among animals in the rainforest.
Lion: The colour of lion helps it in blending in its background. Lion has a highly developed sense of smell and night vision. All of these help a lion in catching the prey.
Elephant: Elephants have well developed sense of smell. It helps the elephant in finding the food. The trunk has powerful muscles which help the elephant in uprooting even a big tree. Elephants have good sense of hearing which help the elephant in sensing danger way in advance. An elephant uses its trunk to sprinkle water all over its body so that it can cool down its body temperature.
Monkeys: Monkeys are highly adapted to live in the rainforests. Monkey uses its palms and soles to grip a branch and thus can hang and swing from a branch. It can also use its tail to hold a branch. Monkeys can climb to the topmost branch of a tree and thus can see very far in the jungle. This helps them in sensing the danger and also in finding the food.
Frogs: Frogs are adapted to live both on land and in water. The greenish colour of the frog helps it in mixing with the green foliage. Frog has a long and sticky tongue with which it catches its prey. The tree-frog has developed sticky pads in its claws. This helps the tree-frog in climbing a tree and in holding on to a branch.
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