Nearing Northern Limits

June 6, 2019 by Team Journey North

Traveling in pursuit of milkweed, monarchs are nearing milkweed's northern limits - and the end of spring migration.

“Two monarchs found my bloomerang lilac.” Photo by: Kat (Oconomowoc, WI)

Almost There…

In the central region, the northernmost first sightings of monarchs have reached milkweed’s northern limit in southern Manitoba and in several of the Great Lakes Islands, notably Beaver Island and Manitoulin Island.

In the east, monarchs have reached southern Canadian provinces of OntarioQuebec and Maine in the U.S.

Generation Two

Females are laying eggs of the 2nd generation now. These monarchs will be the grandchildren of butterflies that overwintered in Mexico. In central U.S., monarch caterpillars have been sighted as far north as Minnesota and sounthern Canadian province of Ontario

Counting Generations

Monarch generations are continuing to cycle. It takes about one month for each to develop. Over the summer, three generations will be produced in the north.

June: grandchildren

July: great-grandchildren

August: great-great-grandchildren—the generation that migrates to Mexico.

Report Your First

No matter when you see your first monarch, we want to know about it. Your sighting is important even if other people have already reported from your region.

Report your first sighting of a monarch adult, egg, and larva.

Read Our Western Monarch Migration Report #17 — and Keep Entering Your Sightings In Journey North