Most hummingbirds start returning to Wisconsin around mid to late April, as they migrate north from their winter homes.
The biggest wave of hummingbirds usually reaches Wisconsin by early to mid-May, especially in the southern and central parts of the state.
The most common species in Wisconsin is the Ruby-throated Hummingbird, known for its iridescent green back and brilliant red throat.
A mild spring can bring hummingbirds earlier, while cold snaps or late frosts might delay their arrival by a week or two.
Put your feeders out by mid-April to ensure early arrivals find food — especially if natural nectar sources are scarce.
Hummingbirds migrate based on daylight length, so even if the weather is cold, their return stays fairly consistent each year.
Hummingbirds usually start their southbound migration in late August, with most gone by early October.