Map | List
Population Count is in...
Mexican officials have announced the size of this year's population. What do the results mean for monarch recovery efforts? More...
A single sanctuary — El Rosario — contains 40% of this winter's population..
Image Estela Romero
Report Your Sightings and Track Migration
Report your sightings each fall and spring as the monarchs travel to and from Mexico.
Track migration on real-time migration maps. Help scientists learn more about monarchs.
Report Your Sightings
What to Report | Where to Report
Spring Migration 2017
February - June
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