Minnesota named the Common Loon its state bird in 1961, and the choice requires no explaining to anyone who has spent a summer evening near a northern lake. This is a large, striking waterbird — nearly the size of a small goose — with a jet-black head, a bold white necklace of spots, and a back covered in a sharp black-and-white checkerboard pattern. The red eye is visible in good light. But it’s the sound that most people know first: a trembling wail that carries across the water and sounds like nothing else in Minnesota’s outdoors.
Loons nest almost exclusively on lakes with clear water and undisturbed shoreline, which means northern and central Minnesota is prime territory. The state holds an estimated 12,000 loons during the breeding season — the largest Common Loon population in the contiguous United States by a significant margin. Most of those birds arrive in April and May, raise their young through summer, and leave by late October or November as the lakes freeze.
Loons do not come to feeders or backyards. Attracting one is not a setup question — it’s a location question. The best places to find them are the lake country of northern Minnesota, particularly the Boundary Waters Canoe Area Wilderness, Voyageurs National Park, and the thousands of lakes from Brainerd north. Early morning on a quiet lake in June or July gives you the best chance of both seeing and hearing them. The All 50 State Birds guide breaks down which state birds visit feeders and which ones you need to go find.
If you came here hoping to attract Minnesota birds at home, start with the Minnesota Backyard Birds guide instead — loons are lake birds, but Minnesota yards can still attract chickadees, nuthatches, woodpeckers, finches, and juncos.
Jump to What You Need
- Quick Facts
- Identification
- Habitat & Range in Minnesota
- Behavior
- Diet
- Where to Find It in Minnesota
- Seasonal Behavior
- Nesting
- Fun Facts
- Conservation
- FAQ
Quick Facts
| Scientific Name | Gavia immer |
| Size | 26–36 inches |
| Wingspan | 41–52 inches |
| Lifespan | Up to 30 years |
| Minnesota Status | Summer resident; migrates in winter |
| Range | Breeds across northern North America; winters on Atlantic and Pacific coasts |
| Named State Bird | 1961 |
| Feeder Friendly | No |
| Best Place to See It | Boundary Waters Canoe Area Wilderness; Voyageurs National Park |
Identification
In breeding plumage — which is what most Minnesota visitors see from May through September — the Common Loon is unmistakable. The head is solid black with a green iridescence in good light. The neck has a white-striped collar, and the back is densely patterned with white spots arranged in neat rows against black. The underside is bright white. It’s a large bird, noticeably bigger than a duck, sitting low and heavy in the water.
The red eye is visible at close range and worth noting — it’s distinctive and striking. In flight, loons look ungainly: long-necked, with feet trailing behind and rapid wingbeats. They need a running start across the water to take off, which is worth knowing if you’re trying to identify a bird that’s been sitting on the lake for a while.
Best ID trick: If you see a large bird sitting low in the water with a perfectly flat back and a black-and-white pattern, it’s almost certainly a loon. Cormorants are sometimes confused for loons, but they sit higher in the water with a more upright posture and lack the white spotting. Ducks are considerably smaller.
Sound and movement: The Common Loon has four distinct calls. The wail — a long, haunting call that rises and falls — is the one most people recognize and associate with northern lakes. The tremolo is shorter and faster, sometimes described as a laughing sound; loons use it when alarmed. The yodel is a complex territorial call made only by males. The hoot is a soft contact call between birds. In the water, loons are smooth and powerful swimmers that dive frequently and can stay submerged for over a minute.
Habitat & Range in Minnesota
Common Loons breed across northern and central Minnesota, with the highest concentrations in the lake-dense counties above a rough line from Brainerd to Duluth. Lake of the Woods, the Boundary Waters, and the Leech Lake area consistently hold large numbers of nesting pairs. As lakes become more developed or as water clarity drops, loon presence becomes less reliable.
Loons require clear water to hunt — they dive and pursue fish by sight. They prefer lakes with a mix of open water for diving and sheltered bays or marshy edges for nesting. A lake that holds loons needs enough depth to fish and enough undisturbed shoreline to nest without repeated human disturbance.
Loons do not come to yards, feeders, or suburban areas. They need open water and are almost never found away from lakes during the breeding season. In migration, they occasionally stop on rivers or reservoirs, but these are temporary resting stops rather than foraging habitat.
Behavior
Watch a loon for any length of time and the defining behavior is the dive. They don’t just dip below the surface — they disappear completely, often reappearing a surprising distance from where they went under. Dives regularly last 45 to 60 seconds and can go deeper than 150 feet. On the surface, loons ride low in the water with a smooth, deliberate movement that looks almost effortless. When something alarms them, they stretch out flat against the water rather than flushing immediately — a behavior called “peering” that lets them assess the threat before committing to a dive or flight.
The territorial behavior is what beginners are least likely to anticipate. Loons hold lake territories year after year and defend them aggressively. A male yodeling from the center of a lake is announcing ownership — and if another loon challenges it, the confrontation can be dramatic and prolonged. Pairs that have used the same nesting site for multiple years show strong site fidelity, returning to the same lake, sometimes to the same exact spot, season after season. In late summer, after the young have fledged, loons begin to gather in loose groups on larger lakes before migration — a staging behavior that can concentrate many birds on a single body of water.
Diet
Fish make up the core of a loon’s diet — perch, sunfish, suckers, and whatever else is available in a given lake. They hunt exclusively underwater, using their red eyes to spot prey from below or from the surface before diving. A loon’s legs are positioned so far back on its body that walking on land is nearly impossible, but that same design makes it one of the most capable underwater swimmers of any North American bird.
Beyond fish, loons take crayfish, frogs, and aquatic invertebrates, particularly in early spring when ice-out lakes may have limited fish accessible near the surface. They swallow prey whole underwater — the image of a loon surfacing with a fish and then flipping it to swallow head-first is a common one near productive fishing spots.
Where to Find It in Minnesota
Common Loons do not come to feeders, and no yard setup will bring one closer. To find a loon in Minnesota, you need to go to the water — and specifically, to the kind of water loons prefer.
The most reliable areas are northern Minnesota’s lake country. The Boundary Waters Canoe Area Wilderness (BWCA) is one of the most reliable loon regions in the state — a multi-day canoe trip gives birders an excellent chance of hearing and seeing loons, often at close range. Voyageurs National Park is another stronghold; the park’s large interconnected lakes hold multiple nesting pairs and offer loon sightings with regularity from the visitor center boat tours. Leech Lake, Lake of the Woods, Upper Red Lake, and the Chippewa National Forest lake complex are all productive. Even in the Brainerd Lakes area at the southern edge of prime loon range, loons appear reliably on cleaner, less-developed lakes.
Timing matters. Loons arrive on Minnesota lakes as ice-out occurs — typically April in the south, May in the north. By mid-May most breeding birds are established on their territories and calling actively. June and July are the best months to see adults with chicks, a sight that requires patience and a quiet approach by canoe or kayak. Loons with small chicks will often carry them on their backs — worth watching for. By late August the young are independent and adults are less vocal; staging birds begin gathering on larger lakes through September and October before migrating south.
Early morning is the most reliable window. Loons are most active and vocal at dawn, when lake traffic is minimal and the water is calm. Calm, clear days improve your ability to watch dives. If you hear the wail carrying across the water, you’re in the right place.
For more places to explore beyond loon lakes, the Minnesota Birding Resources guide covers hotspots, organizations, and beginner-friendly birding tools across the state.
👉 All 50 U.S. State Birds — which state birds visit feeders and which ones you need to go find
Seasonal Behavior
Winter: Common Loons are absent from Minnesota in winter — the lakes freeze and loons cannot survive without open water for fishing. Minnesota birds migrate to the Atlantic and Gulf coasts, where they spend several months in non-breeding plumage: gray-brown above, white below, with no trace of the dramatic summer markings. A loon in winter plumage on a coastal bay is easy to overlook entirely.
Spring: The return to Minnesota lakes is one of the cleaner calendar events in the state’s birding year. Loons follow ice-out north, arriving on open water as soon as it’s available. Territorial calling begins quickly — the first loon wail of the year on a newly thawed northern lake is a genuine seasonal marker. Males establish or reclaim territories and pair bonds are reaffirmed through calling duets that can last for minutes.
Summer: Nesting happens in May and June, with chicks typically hatching in late June or early July. The adults’ behavior shifts noticeably once chicks are present — more time in sheltered bays, quieter calling, more alert responses to boats or kayakers that approach. Chicks are dependent on both parents for food and thermoregulation through their first weeks. By late July, chicks are growing rapidly and beginning to practice diving alongside the adults.
Fall: Loons begin staging in September, gathering on larger lakes in small groups. Juveniles typically migrate before adults, departing in September and October. Adults follow in October and November, with the last birds leaving as the lakes freeze. Staging concentrations — sometimes a dozen or more birds on a single productive lake — can offer extended watching opportunities in late September on large lakes in northern Minnesota.
Nesting
Loons nest at the water’s edge, typically on a low mound of vegetation just above the waterline on a sheltered point or small island. The nest is minimally built — a scrape of plant material pulled together from immediately around the site. Both parents incubate. The pair often uses the same site year after year; artificial nesting platforms installed by conservation programs are accepted readily by pairs that have lost natural sites to wave erosion or shoreline disturbance.
Loons cannot walk normally on land — their legs are positioned too far back — so the nest must be placed where the bird can slide directly into the water. Any nest more than a few feet from the water’s edge is inaccessible. Nest sites close to human activity, boat wakes, or fluctuating water levels have lower success rates. Natural shoreline vegetation and buffer zones significantly improve nesting outcomes.
Nest location: Shoreline edge on low point or island; sometimes artificial platforms Materials: Aquatic vegetation, mud, plant debris Eggs per clutch: 1–2 Broods per year: 1 Incubation: 26–31 days Nestling period: Approximately 77–84 days before young can fly
Fun Facts
Minnesota’s loon population — estimated at around 12,000 birds during the breeding season — represents the largest concentration of Common Loons in the contiguous United States. For context, the state holds roughly 40% of the lower-48 breeding population.
A Common Loon’s bones are denser than those of most birds, which reduces buoyancy and makes diving easier. The tradeoff is that loons are too heavy to take off from land — they need a long surface run of up to a quarter-mile on water to become airborne. Loons that land on small ponds or wet pavement during migration can become stranded.
The loon’s red eye may help with underwater vision, especially in low-light conditions below the surface — though the exact mechanism is still studied, the eye’s optical properties appear well-suited to the demands of deep diving in variable light.
Loon pairs that successfully breed together tend to maintain long-term bonds, but those bonds are tied to the territory, not to each other. If one bird disappears, the surviving mate typically continues to use the same lake and may pair with a new bird the following season. The lake itself, rather than the partner, appears to be what loons are loyal to.
The Common Loon call has appeared in film and television soundtracks set in locations where loons have never lived — deserts, tropical islands, urban settings — often as shorthand for “wilderness.” It’s one of the most misused sound effects in American media.
Conservation
The Common Loon is listed as Least Concern globally, and Minnesota’s population has been broadly stable in recent decades — a positive result given the range of pressures the species faces. The Minnesota Loon Monitoring Program, run through the Minnesota DNR and supported by thousands of volunteer observers, has tracked nesting success across the state since the 1990s and provides the data foundation for population management.
The primary threats in Minnesota are lead poisoning from ingested fishing tackle, mercury contamination in fish (which concentrates in loons at the top of the food chain), and shoreline disturbance during the nesting season. Lead sinkers and jig heads are ingested when loons swallow small fish or, in some cases, when they pick up tackle directly from the lake bottom. Lead poisoning is consistently identified as a major cause of adult loon mortality in Minnesota. Minnesota has also moved toward tighter restrictions on small lead fishing tackle, with recent legislation targeting certain small lead sinkers and jigs. Even where rules are changing, angler adoption remains important — switching to non-lead tackle is one of the simplest ways people can directly reduce loon mortality.
Mercury in Minnesota lakes is a product of atmospheric deposition — much of it originating from coal-burning power plants — and the state’s loons carry measurable mercury burdens that, in some cases, affect reproductive success. Shoreline development reduces available nesting habitat and increases wave action from motorized boats, which can flood low-lying nests. Keeping noise, boats, and foot traffic away from loon nesting areas — particularly from ice-out through early July — is the most direct action individual Minnesotans can take to support nesting success.
Status: Least Concern Population trend: Stable
Frequently Asked Questions
The best places are northern Minnesota’s lake-rich regions: the Boundary Waters Canoe Area Wilderness, Voyageurs National Park, the Chippewa National Forest lake complex, Leech Lake, and Lake of the Woods. The BWCA in particular offers excellent loon habitat, and even a short canoe trip gives you a strong chance of hearing or seeing loons during the breeding season. Even on accessible drive-to lakes in northern Minnesota, quiet early mornings from late May through July offer reliable loon encounters.
The loon’s signature call is the wail — a long, quavering cry that rises and falls and carries across open water. It’s the sound most people associate with northern lakes. Loons also produce the tremolo (a rapid, laughing call used when alarmed), the yodel (a complex territorial call made only by males), and the hoot (a quiet contact call between birds). If you want to learn them before visiting, Cornell Lab’s All About Birds has recordings of all four. The tremolo is the most commonly heard during daytime activity; the wail typically carries farthest and is most striking at dawn or dusk.
Minnesota designated the Common Loon as its state bird in 1961. The choice came through a statewide vote organized by the Audubon Society, which gave Minnesota residents a direct say in the designation — an unusual approach at the time. The Loon won handily over the American Goldfinch and the American Robin. The result wasn’t surprising: loons had long been embedded in Minnesota’s identity as a lake state, associated with the same wilderness character that draws visitors to the north woods. It’s worth noting that Minnesota’s loon population gives the state a legitimate claim to the bird that other states couldn’t make.
Minnesota is the only state that has named the Common Loon its official state bird. It is, however, the provincial bird of Ontario — a fitting designation given that Ontario holds one of the largest loon breeding populations in the world and shares much of the same boreal lake habitat that Minnesota’s loons depend on.
No. Common Loons are summer residents in Minnesota, arriving after ice-out in spring — typically April in the south, May in the north — and departing before the lakes freeze, usually October or November. They spend winters on the Atlantic and Gulf coasts, where they’re often seen offshore or on open bays in their gray, non-breeding plumage. Minnesotans who spot an unfamiliar gray-and-white bird on a coastal trip are sometimes surprised to learn it’s the same species they heard calling on a northern lake in July.
The loon is Minnesota in a way that’s hard to separate from the place itself. The state has more lakes than any other in the lower 48 — over 10,000 — and loons occupy those northern lakes so completely that the bird and the landscape have become part of the same identity. The call carries something specific to the Minnesota north woods experience: the sound of open water, distance, and wild country. Beyond the symbolism, Minnesota had a practical claim — the state’s loon population is the largest in the contiguous United States, and the bird genuinely belongs to this place more than anywhere else in the lower 48.
No. Common Loons are aquatic birds that require open water with fish to survive. They cannot walk on land, cannot take off from a small area, and have no interest in seed, suet, or any typical feeder food. If you want to see a loon, the path is getting to the right lake at the right time — not setting up a backyard feeding station. For birds that do visit Minnesota yards, Minnesota Backyard Birds covers what you can realistically attract and how.
Lead poisoning from ingested fishing tackle is the most consistently documented cause of adult loon mortality in Minnesota. Loons swallow small fish whole and sometimes ingest lead sinkers or jig heads in the process. Mercury contamination in fish — a byproduct of atmospheric deposition from power plant emissions — accumulates in loons and can reduce reproductive success. Shoreline development and boat wake disturbance during nesting season are ongoing habitat pressures. Individual actions that help include switching to non-lead fishing tackle and giving loon nesting areas a wide berth from ice-out through early July.
More Minnesota Birding
Minnesota’s loon country is worth exploring beyond the state bird itself. If you’re planning time in the north woods, the pages below will help you know what else to expect.
👉 Minnesota Backyard Birds 👉 Minnesota Birding Resources 👉 All 50 U.S. State Birds
Related Pages
👉 All 50 U.S. State Birds 👉 Backyard Birds by Species 👉 Minnesota Backyard Birds 👉 Minnesota Birding Resources