when do hummingbirds leave

Hummingbirds typically begin their migration south starting in late July or early August, with the migration continuing in waves through early October. Male hummingbirds generally leave first, followed by females and young birds. The population of hummingbirds in a given area usually drops off significantly by the end of September, though some stragglers may still be around into late October. It is common practice to keep hummingbird feeders up through the end of October to support these late migrants. Hummingbirds migrate in response to seasonal changes such as shorter daylight hours and reduced food availability, and their migration usually lasts through August, September, and early October, depending on the species and location.