Journey North has been tracking the migration of monarchs and other creatures for a number of years and relies on citizen/community scientists to report their first and ongoing sightings of monarch adults, larvae (caterpillars), and eggs. You can see weekly progress of the monarchs as they move forward in the spring, as well as their migration south or southwest in the fall.
Visit them at journeynorth.org and become a citizen scientist by reporting your own sightings throughout the monarch season.
Along the Wasatch Front area, we typically see our first monarch adults arrive in late May and arriving sooner in southern and central Utah. Our northern population continues to increase in numbers through September when the fall migration occurs.
One of the smaller sites where monarchs cluster on Monterey cypress and non-native eucalyptus trees
This is the largest site of 200-300 overwintering colonies on the California coast
A site located at Lighthouse Beach