The Monarch Butterfly Biosphere Reserve is a protected area and a UNESCO World Heritage Site. During the winter season (October through to March), it hosts approximately 60 million monarch butterflies arriving at the end of an epic 4000 kilometre migration, from east of the Rocky Mountains.
- Where: Michoacan state
- Ideal for viewing: Monarch butterfly, Grey fox, Great horned owl, White-tailed deer, Long-tailed weasel
- Excellent for: Walking safaris, Birdwatching