2010年11月4日星期四
Do You Want To Know About Butterfly Life Cycle?
Butterfly is an insect which is of interest to many people owing to its colours and beauty, habitat, and life cycle. The life cycle of a butterfly is the most explained one to kid in science classes and fairs. This can be demonstrated easily without any much set up and understood easily also. The life cycle of butterflies are described as the complete life cycle as it goes through all stages in the life cycle of insects and is in accordance with the theory. There are four stages in the life cycle of a butterfly. These are egg, caterpillar, pupa, and butterfly. Each stage is distinct from one other and is easily recognizable as well. This process in which the adult grows from the egg, undergoing different phases is known as metamorphosis. The eggs are tiny and rounded in shape. These are laid on the host plants which the caterpillar will feed on. The eggs remain in the state for six to seven days. The caterpillar is the stage when the larva crawls out of the egg and start feeding on the host plant. It usually has interesting stripes and patterns and hairy things on its body. When fully grown into a caterpillar, it will have six legs and some extra prolegs. This phase witnesses the feeding and growth stage of the butterfly. The caterpillar feeds tremendously on the host plant and will eat almost the whole of the plant. Moulting is the process in which the outer skin of the larva is shed. During the caterpillar stage, it undergoes moulting several times due to it rapid growth. Once it reaches a certain stage, the caterpillar goes into the dormant stage and becomes a pupa. The caterpillar creates a cocoon around the body and gets attached to the stem or underside of leaves using strong silk thread generated by self. The pupa will usually be colourful. Inside, while the pupa remains dormant, the tissues are broken down and it develops the structures of the insect like the wings, antenna, and body for it to fly out and survive in the nature. These do not fall off during winds or rains. The final stage is the butterfly which emerges from the pupa. It breaks open the covering and comes out fluttering its wings. Then it feeds on nectar and undergoes mating and lays eggs. The life span of an adult butterfly varies from species to species. Some live only for a month or two, while some lives for years. The life cycle of butterfly is the very often chosen life cycle of insect to be taught in schools. Kids or teachers collect plants with the butterfly eggs and observe each phase of the life cycle. This kind of demonstration will help kids learn the process effectively. One must not touch the creature during any phase of its growth as it can hinder the process of its development. Learning the life cycle of butterfly is easily. You can either observe it closely in the nature or refer the internet resources with explanations and pictures of the various phases.
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