Millions of monarch butterflies mass together on oyamel fir tree branches at the Sierra Chincua Biosphere Reserve January 20, 2020 near Angangueo, Michoacan, Mexico. The monarch butterfly migration is a phenomenon across North America, where the butterflies migrates each autumn to overwintering sites in Central Mexico.

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Size: 5982px × 8973px
Location: Angangueo, Michoacán, Mexico
Photo credit: © Richard Ellis / Alamy / Afripics
License: Licensed
Model Released: No

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