when do hummingbirds leave michigan

Hummingbirds, specifically Ruby-throated Hummingbirds, typically leave Michigan by the end of August or early September. By mid-September, almost all hummingbirds have migrated south and won't return until the following spring. However, it is common to see some late-departing stragglers into late September, especially those coming from farther north. It's generally recommended to keep hummingbird feeders up until no hummingbirds have been seen for two weeks to ensure even the late migrants have enough energy for their long journey south.