Monarch butterflies are concentrated in North America, Central America, and South America but can also be found in Australia, Hawaii, India, and other locations. In North America the most well-known monarchs are the western monarch (Danaus plexippus), a population that migrates between California and other western states, and the eastern, or migratory, monarch butterfly (D. plexippus plexippus), which is found throughout the eastern United States and Canada during the summer months. The migratory monarch makes an annual journey from its tiny overwintering habitat in the oyamel fir forests of Mexico to its vast breeding grounds across eastern North America.
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