Monarch Butterfly Biosphere Reserve, Michoacan, Mexico / In the coniferous forests of the Sierra Chincua, the Monarch Butterfly, Danaus plexippus, winter in the forest, covering trees. 122001V4

Monarch Butterfly Biosphere Reserve, Michoacan, Mexico / A mid-January freeze killed Monarch Butterflies, Danaus plexippus, cover ground, Sierra Chincua. Some alive with wings spread. 12002H5

Monarch Butterfly Biosphere Reserve, Michoacan, Mexico / A mid-January freeze killed Monarch Butterflies, Danaus plexippus, cover ground, Sierra Chincua. Some alive with wings spread. 12002V15