monarch
US /ˈmɑː.nɚk/
UK /ˈmɑː.nɚk/

1.
2.
a large migratory American butterfly with a striking orange and black pattern, breeding in Canada and the US and migrating to Mexico and California in winter
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The garden was filled with beautiful monarchs fluttering among the flowers.
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The migration of the monarch butterfly is an amazing natural phenomenon.