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Fall Bird Migration in Wisconsin

Wisconsin's autumn runs on two clocks: cranes hold on the central Wisconsin wetlands until the water starts to close, and hawks slide down the Lake Michigan shore through September and October.

Agency viewing sites
2
Species documented
4
Mapped
2
Where to stand

Public viewing sites in Wisconsin

Every place below is one an agency itself describes for watching the fall passage, with the agency named and linked, the species it documents there, the months it names as the peak, and the facility that exists: a tour route, a platform, a tower, a visitor centre. Where the agency wrote a sentence worth reading, it is quoted exactly.

Necedah National Wildlife Refuge, Necedah FederalMarquee site

The exposed bed of Glacial Lake Wisconsin: shallow wetland, oak savanna and sand prairie in the Great Wisconsin Swamp

Sandhill craneWhooping crane

Necedah is the refuge the eastern whooping crane reintroduction was built around, and its own seasonal calendar tracks the birds right through the year: pairs defending territories and building in spring, flightless colts foraging with their parents in summer, waterfowl migration peaking in the autumn, and the last few cranes, ducks and swans gone by the middle of November. The refuge was established in 1939, keeps an observation tower and hiking trails, and its lands are open sunrise to sunset.

“The last few cranes, ducks and swans depart by mid-November.”
U.S. Fish and Wildlife Service, Necedah National Wildlife Refuge, quoted exactly.

Run by U.S. Fish and Wildlife Service

Forest Beach Migratory Preserve, Belgium Public platform

A 116 acre former golf course being restored to grassland and wetland for migrant birds, a mile in from the Lake Michigan shore

Broad-winged hawkSharp-shinned hawk

The fall count here works September 1 to November 30 on the Ozaukee County lakeshore, the same flyway the older banding station a few miles north has worked since the 1930s. The numbers are modest against the Great Lakes giants, averaging 216 broad-winged and 269 sharp-shinned hawks a season, but this is the Wisconsin shoreline site a visitor can actually walk into.

“Former 18-hole, 116-acre, golf course purchased in 2009 that is being restored for migrant birds through establishment and management of a variety of plant communities and wetlands.”
HawkCount.org site profile, Forest Beach Migratory Preserve, quoted exactly.

Run by Volunteer count reporting to HawkCount

The map

Wisconsin sites, refuges and the reporting record

Style
Records
Layers

Viewing sites in Wisconsin, with the national wildlife refuges in the state drawn underneath. The coloured grid is where people have uploaded a verified sandhill crane record to iNaturalist in September, October, November and December, brighter where more have been logged. It is a map of reports rather than of birds: it thickens around refuges, car parks and towns because that is where observers stand, and it shows past reports rather than birds present today. Pins are public viewing sites an agency itself describes; grey dots are US Fish and Wildlife Service refuges and hatcheries, drawn because the refuge system is where most of the staging happens.

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When

When the passage peaks in Wisconsin

U.S. Fish and Wildlife Service, Necedah National Wildlife Refuge puts the Wisconsin peak at September through mid November for the cranes at Necedah, where the refuge says the last of them leave by mid November. That describes a pattern across past autumns. The week itself swings with the weather: a cold front to the north moves cranes and geese south in a single night, and a warm spell holds them for weeks. Dawn and the last hour before dusk are when cranes and geese move between the fields and the water, and that movement is the spectacle the platforms are built for.

Wisconsin's two autumn stories sit at opposite ends of the state. In the centre, the wetlands left behind by Glacial Lake Wisconsin hold staging cranes until the weather pushes them out, and the federal refuge at Necedah, the home of the eastern whooping crane reintroduction, puts the last departures in the middle of November. On the Lake Michigan shore, hawks follow the coastline south through September and October, and the public site on that line is Forest Beach Migratory Preserve in Ozaukee County. Crex Meadows in Burnett County draws more than 100,000 visitors a year to its roads and observation areas, but the state page describes no month for any bird carried here, so it is left off.

Below, one curve per species the agencies document in Wisconsin: every research grade observation members of the public have uploaded to iNaturalist for the state, by calendar month across every year the platform holds, with September to December shaded. Counts of uploads, so they measure observers as well as birds, and the shape is worth reading where the absolute numbers are not.

Sandhill crane

5,926 research grade sandhill cranes observations have been uploaded to iNaturalist for Wisconsin across every year the platform holds, and 20 percent of them fall in the four shaded autumn months. The busiest month in the record is May. An autumn month carries about 0.51 times as many uploads as an average month outside autumn. People upload most of everything in July, so a bar that rises after that is the stronger signal. Counts of what people reported, measuring observers as well as birds. See the autumn records.

Broad-winged hawk

422 research grade broad-winged hawks observations have been uploaded to iNaturalist for Wisconsin across every year the platform holds, and 13 percent of them fall in the four shaded autumn months. The busiest month in the record is August. An autumn month carries about 0.29 times as many uploads as an average month outside autumn. People upload most of everything in July, so a bar that rises after that is the stronger signal. Counts of what people reported, measuring observers as well as birds. See the autumn records.

Sharp-shinned hawk

177 research grade sharp-shinned hawks observations have been uploaded to iNaturalist for Wisconsin across every year the platform holds, and 38 percent of them fall in the four shaded autumn months. The busiest month in the record is January. An autumn month carries about 1.25 times as many uploads as an average month outside autumn. People upload most of everything in July, so a bar that rises after that is the stronger signal. Counts of what people reported, measuring observers as well as birds. See the autumn records.

Whooping crane

454 research grade whooping cranes observations have been uploaded to iNaturalist for Wisconsin across every year the platform holds, and 20 percent of them fall in the four shaded autumn months. The busiest month in the record is June. An autumn month carries about 0.5 times as many uploads as an average month outside autumn. People upload most of everything in July, so a bar that rises after that is the stronger signal. Counts of what people reported, measuring observers as well as birds. See the autumn records.

Sandhill cranes flying in a loose line across a pale open sky, necks held straight out in front and long legs trailing behind them
Sandhill cranes crossing a refuge on the morning flight. The movement is watched from the designated pullout or platform: the birds settle on shallow water for the night, and the roost itself is the one place a viewing site is never placed. “Sandhill cranes flying over Sherburne National Wildlife Refuge (24542820818)” by USFWS Midwest Region from United States, CC BY 2.0
Latest reports

What people have reported in Wisconsin lately

The most recent research grade autumn observation of each species that anyone has uploaded to iNaturalist for Wisconsin, as a date and the platform’s own coarse locality. Evidence that people do find sandhill crane and broad-winged hawk here. Each is one bird on one past day: the flocks move with the weather, so where they are this week is what the agency page and its counts answer.

Checking the most recent autumn uploads for Wisconsin on iNaturalist...

Elsewhere

Other states with agency designated migration viewing

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Questions about Wisconsin

Inventory compiled 2026-09-19 from the agency pages linked above. Agency text is quoted exactly with its source named and linked; the observation curves and latest reports are counts and dates from public uploads to iNaturalist.

Winter eagle watching in WisconsinThe same refuges and rivers three months later, when the ice concentrates the eagles.Wisconsin waterfowl seasonThe hunting calendar on the same marshes, worth knowing before standing on a dike in October.Wisconsin daylight hoursThe dawn and dusk flights are the spectacle, and the clock change moves them.