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Insect, small, air-breathing animal characterized by a segmented body with three main parts—head, thorax, and abdomen. In their adult forms, insects typically have three pairs of legs, one pair of antennae, and in most instances, two pairs of wings. Insects rank among the most successful animals on Earth. About one million species of insects have been identified so far, which is about half of all the animals known to science. That is why for …

…from unsuitable dry areas to greener areas where rains are falling. In North America, Monarch butterflies will migrate to Mexico and coastal California to avoid harsh Canadian winters. Locally, ladybird beetles migrate to mountain tops during winter and summer. Seventh, in some groups of insects, truly social behavior has evolved. Social behavior will allow a large population to survive through difficult periods via cooperation in food gathering, food storage, temperature control, and colony ------------------------------------------------------------------------ **Bibliography**