Loon yodel at 4am on a still lake. State bird, state sound.
Minnesota’s 11,000 lakes, the Boundary Waters, and the Mississippi Flyway combine to give the state one of the strongest waterbird populations in the central US. Twenty-six regular species hold breeding or migrating territory here: from the iconic Common Loon (state bird) to the dramatic recovery of the Trumpeter Swan, from the secretive Black Tern of shallow marshes to the unmistakable Sandhill Cranes that gather in thousands at Sherburne NWR. A naturalist’s region by region overview of what you’ll actually find.
The 26 regular species, by group
Loons and Grebes:
- Common Loon - the state bird. Northern lakes May-October. Yodel call.
- Red-throated Loon - migrant only, Lake Superior in late autumn.
- Pied-billed Grebe - small ponds and marshes, statewide.
- Horned Grebe - migrant on larger lakes.
- Western Grebe - western Minnesota lakes, breeding colonies.
Swans, Geese, and Ducks (selected):
- Trumpeter Swan - reintroduction success. Now breeding statewide.
- Tundra Swan - migrant only, often massed at Weaver Bottoms on the Mississippi in November.
- Canada Goose - everywhere, year-round.
- Snow Goose - migrant, peak counts at Mille Lacs in March.
- Wood Duck - cavity-nesting beauty, river bottoms and wooded ponds.
- Mallard - everywhere wet.
- Northern Pintail - migrant on flooded ag fields.
- Blue-winged Teal - common breeder in prairie potholes.
- Ring-necked Duck - typical northern lakes.
- Common Goldeneye - winter on open Mississippi water.
- Hooded Merganser - small wooded ponds.
- Common Merganser - large clean rivers and lakes.
Herons, Egrets, and Bitterns:
- Great Blue Heron - statewide rookeries.
- Great Egret - increasing northward; common south.
- Green Heron - small ponds and stream edges.
- Black-crowned Night-Heron - colonial breeder, prairie marshes.
- American Bittern - secretive, gurgle call from dense reeds.
Rails, Cranes, and Terns:
- Sora - common but rarely seen in dense marshes.
- Sandhill Crane - massed migration at Sherburne and Crex Meadows.
- Black Tern - shallow marshes, declining.
- Forster’s Tern - large prairie marshes.
Where to actually find them
- Boundary Waters and Voyageurs - Common Loon, Common Merganser, Bald Eagle. June best for loon chicks.
- Sax-Zim Bog (winter add-on) - Trumpeter Swan in winter open water; Great Grey Owl bonus.
- Sherburne NWR - peak Sandhill Crane gathering October; Trumpeter Swan year-round.
- Weaver Bottoms / Upper Mississippi NWR - Tundra Swan, Canvasback, scaup in November.
- Crex Meadows (just over the WI border) - Sandhill Crane and Black Tern.
- Tamarac NWR - rails, bitterns, Trumpeter Swan.
- Lake Superior North Shore - migrant Red-throated Loon, scoters, Long-tailed Duck in autumn.
Seasonal timing
- April-May - massive northward migration. Tundra Swans peak early April.
- June-July - breeding. Loon chicks visible mid-June. Wood Duck broods on rivers.
- August - moulting flocks of mergansers and goldeneyes.
- September-November - southward migration. Sandhill Cranes peak mid-October.
- December-March - reduced species count, but Trumpeter Swans on open river bends are spectacular.
Minnesota in winter is harsher than most of the central states, so the species count drops sharply. The compensation is uncluttered viewing of the hardy holdouts.
Sibley Field Guide East
Covers every Minnesota regular.
Minnesota's waterbirds are mostly Eastern North American species, so the Sibley East volume covers them all in proper detail. The loon and merganser plates separate juveniles and eclipse-plumage drakes, which is where most people get stuck identifying late-summer broods.
- Covers 650+ species of eastern North America
- Juvenile and eclipse plumage included
- Pocket-friendly format for field use
Sibley · 2nd Ed.
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The bottom line
Minnesota holds 26 regular waterbird species across its lakes, marshes, and Mississippi corridor. The Common Loon is the state bird and the soundtrack. Best months are May-June for breeders and October-November for migrants. Sherburne, Sax-Zim, Tamarac, and Weaver Bottoms are the highest-value sites.
For more, see water birds in Indiana and North American geese.
