The number of Monarch butterflies out in the Front Garden seems to have peaked. For a while there were 6 or 7 at any typical moment, just recently it’s dropped to 3 or 4. I take this to mean that the core of the southern Monarch migration has passed through our area. Within a week or two they will be gone altogether.
Chip Taylor of Monarch Watch divides the yearly Monarch migration into 6 overlapping stages:
- Overwintering in Mexico (late October to early April);
- Migrating north through Mexico (late February through April);
- Breeding in the US (March and April);
- “Recolonization” of the area north of the 37th parallel (a line very close to the southern borders of Virginia, Kentucky, Missouri, and Kansas) – May to early June;
- Summer breeding (June to August);
- Fall migration back to Mexico (August to October).
It’s funny to think that during the migration, it’s most likely different individual Monarchs that I’m seeing in the garden every day.
In his August newsletter, Chip Taylor expressed uncharacteristic optimism about the Monarch population trends for the coming months. He said that “Stage 5 recolonization has been excellent with respect to both timing and numbers” – though much less so in the Northeast.
He predicted an overwintering population in Mexico covering 5-6 hectares, in the same ballpark as last winter but high in the context of the last dozen years.
So, there is some cause to feel guardedly optimistic for the near term.
Monarch on Mexican Sunflower (Tithonia rotundifolia).
This year Monarchs’ late summer favorites have been Mexican Sunflower, Zinnias, and Joe Pye Weed (Eutrochium maculatum).
This fall I’ll be planting some Meadow Blazing Star (Liatris ligulistylis). Based on the photographs posted by friends, this plant is an absolute Monarch magnet, so I’m excited to add it to our garden.
Here’s a Monarch sharing a flower with a Painted Lady. They look like they’re out on a date!
The Monarch migration in Eastern North America remains highly precarious, so gardeners and others should keep adding native Milkweeds to their gardens. In the meantime, it is inspiring to watch this butterfly as it journeys once again to its winter home, setting the stage for next summer’s return.