INTRODUCTION:
INTRODUCTION People dread the insects known as mosquitoes because of the itchy bump they cause when they bite. Mosquitoes can also transmit such serious diseases as yellow fever and malaria through their bite only. Only certain kinds of female mosquitoes bite other animals, including humans. This is because these females need blood for their eggs to develop, and they draw some blood from the animals that they bite. Male mosquitoes live on juices that they suck out of plants. Mosquitoes are related to flies and gnats.
WHERE MOSQUITOES LIVES:
WHERE MOSQUITOES LIVES There are about 2,500 species, or kinds, of mosquitoes. They are found almost everywhere in the world except open oceans, the driest deserts, and the polar regions. In cool areas mosquitoes may hibernate during the winter. Mosquitoes are plentiful in wet regions because they need water for development during their first stages of life. However, mosquitoes can lay their eggs in just about any standing water, including containers that have collected rainwater.
PHYSICAL FEATURES:
PHYSICAL FEATURES A strong covering known as the exoskeleton surrounds a mosquito's soft body. Mosquitoes have a round head with eyes, complex mouthparts, and two antennae. The major body segment behind the head is called the thorax. Two narrow wings and six long legs are attached to the thorax. Behind the thorax is the abdomen, which has openings for reproduction and getting rid of wastes. The female mosquitoes that bite other animals have special mouthparts, which together are called the proboscis. This structure looks like a thin, usually straight tube. It is used for piercing skin and sucking blood. A female injects saliva into the wound to keep the blood flowing freely into her. This saliva is what causes a mosquito bite to itch. Because males do not bite, they have different mouthparts that are suited for feeding on plant juices.
LIFE CYCLE :
LIFE CYCLE Mosquitoes go through four distinct stages in their life. They begin as eggs, which the females lay in a tiny cluster on the surface of standing water. These eggs then hatch into larvae that are called wrigglers because of the jerking motions they make when swimming. After molting (shedding their outside covering) a few times, mosquitoes then become pupae, or tumblers. These pupae also live in the water. Within days the pupae develop into adults that are able to fly away and breed. The length of the whole process differs among the many species of mosquitoes.
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