No big mammal for this week’s wildlife photo, instead it is a little butterfly.

Monarch butterflies are arguably the most famous. and common, butterfly found in North America. A Canadian summer doesn’t seem the same without seeing them, yet they don’t stay in Canada all year. These butterflies are the only ones in the world to do a round-trip migration similar to what birds do.

When weather starts to turn cold in Canada, they begin a journey south towards Mexico, where they stay until spring before returning to Canada. With more than 100million butterflies  making the migration, Monarchs  are known to congregate in huge numbers when they arrive in Mexico, often covering entire trees and turning them ‘orange’.