Coots in Prairie Wetlands: Identification, Habitat and Behavior

Coots in prairie wetlands are almost always American Coots (Fulica americana). These plump, slate-black waterbirds have a bright white bill and lobed toes rather than webbed feet. They live in marshes and ponds with a mix of open water and emergent plants such as cattails and bulrushes. They eat mostly aquatic vegetation, which they gather from the surface, by short dives or by grazing on shore. They build floating nests anchored in marsh vegetation, typically from spring into early summer. Each autumn they gather in large flocks before migrating south.

This guide covers what to notice and why it matters, so your next walk along a prairie slough is a little richer.

What Are Coots, and Why Are They Not Ducks?

A coot is a member of the rail family (Rallidae), the same group as rails and gallinules. It is not a duck, even though it swims like one. The bill is the first clue. A duck has a broad, flattened bill. A coot has a short, pointed, chicken-like bill. Coots also bob their heads forward as they swim, and they patter across the water surface on long running takeoffs.

On the North American prairies, the American Coot is the species you will meet. The closely related Eurasian Coot (Fulica atra) is the familiar coot of the United Kingdom and much of Europe and Asia. It appears later in this guide because many readers compare the two.

How to Identify an American Coot

An adult American Coot is a dark gray to blackish waterbird, roughly the size of a small duck. Look for a white bill, a dark ring near the bill tip, red eyes and white patches under the tail. Once you know these features, you can identify a coot at a glance, even at a distance.

Field marks on adult birds

• Body: uniformly sooty or slate-colored, darkest on the head and neck.
• Bill and shield: a white bill extends up onto the forehead as a white frontal shield, a bare plate above the bill. On American Coots, a small reddish-brown swelling usually sits at the top of the shield.
• Eyes: red in adults.
• Undertail: white feathers on each side of the undertail. They flash when the bird swims away or raises its tail in a display.
• Legs and feet: greenish-yellow legs with large, lobed toes.
• Movement: a nodding, head-pumping swim, short dives with a little hop, and a long splashing run across the water to take off.

What are lobed toes?

Lobed toes are toes edged with flat, scalloped flaps of skin, which fold and spread separately on each toe. Webbed feet, by contrast, have skin joining the toes together. When a coot paddles, the lobes open to push against the water. On the forward stroke they fold back to reduce drag. On mud or floating vegetation, the separate toes give better footing than a webbed foot would.

You will see this best when a coot walks out onto a muskrat house, a mudflat or a mown lawn by a pond. It is a satisfying detail to sketch in a field notebook.

Chicks and juveniles

American Coot chicks look very different from their parents. They are covered in black down, with orange-red, hair-like plumes around the head and neck and a reddish bill and bare crown. Many first-time observers do not recognise them as coots at all.

As they grow, juveniles turn pale gray, especially on the face and underparts, and their bills are duller. By autumn, young birds look closer to adults but are often still paler. Note these stages and dates in your field notes over the summer. They help you track how a local pond's breeding season is progressing.

Coots compared with similar prairie wetland birds

Where Do Coots Live in Prairie Wetlands?

American Coots favour prairie wetlands that hold water through the breeding season. They need both open water for feeding and stands of emergent marsh vegetation for cover and nest sites. In prairie country, that usually means semipermanent sloughs, larger potholes, marsh edges of lakes and well-vegetated stormwater or farm ponds.

Wetland biologists sometimes call the ideal arrangement a hemi-marsh. In a hemi-marsh, open water and emergent plants such as cattails, bulrushes and reeds are mixed in roughly balanced patches rather than one solid block. Coots often do well in such marshes because food and shelter are close together.

Water levels on the prairies rise and fall with snowmelt, rain and drought. A pond that teems with coots in a wet spring may hold few or none in a dry year. Record water conditions alongside your bird counts, because the two tell a story together.

Coot Feeding Habits: What Do Coots Eat and How?

Coots are mainly plant eaters. Their diet centres on aquatic vegetation such as pondweeds, algae, duckweed and other submerged and floating plants, along with grasses and sedges near shore. They also take animal food when it is available, including aquatic insects, snails, small crustaceans and occasionally tadpoles or small fish. Young chicks rely heavily on protein-rich invertebrates that their parents bring them.

Four feeding methods to watch for

• Surface feeding: picking food from the water surface or from floating mats of vegetation while swimming.
• Upending: tipping forward, tail up, to reach plants just below the surface, much like a dabbling duck.
• Diving: short dives, often starting with a small forward hop. The coot usually surfaces nearby with a mouthful of greenery. Its body is fairly buoyant, so it pops back up quickly.
• Grazing on land: walking out onto shorelines, grassy dikes, lawns or golf courses to nip at grass and other green plants.

Why coot foraging behavior is worth watching

Coot foraging behavior often involves other birds. Coots sometimes snatch plants from diving ducks as they surface. Some ducks, such as American Wigeon and Gadwall, in turn hover around diving coots to steal what they bring up.

Watching one small patch of water for ten minutes can show you these interactions. Note which feeding method each coot uses, how deep the water is likely to be, and which species are nearby. Over a season, you may notice coots grazing ashore more in late summer and autumn, and diving more where submerged plants are thick.

American Coot Nesting Habits

American Coots nest on floating platforms of plant material. They anchor these platforms to emergent vegetation, usually cattails or bulrushes standing in water near open water. Both members of a pair take part in nest construction, incubation and brood care, which makes coot nesting behavior easier to observe than that of many secretive marsh birds.

Where do coots nest?

Coots nest in standing water within or at the edge of emergent marsh vegetation. The nest is often built among or against stems of cattail, bulrush or reed, close enough to open water for the birds to slip out to feed. The surrounding water helps protect the nest from land predators, and the vegetation hides it and holds it in place.

Prairie pothole wetlands with a hemi-marsh pattern offer many such nest sites. This is one reason the region matters so much for breeding coots.

Nest construction and extra platforms

A coot nest is a bowl-shaped heap of dead and green stems, built up from the water and lined with finer material. Coots commonly build more than one structure during the nesting season:

• Display platforms: used for courtship and pair activity.
• The egg nest: the platform where eggs are laid and incubated.
• Brood platforms: resting rafts where chicks are brooded after they leave the egg nest.

If you see a coot carrying a dripping strand of vegetation across a slough, a nest or platform is probably being built or repaired nearby. Note the direction it travels, but do not follow it into the marsh.

Eggs and incubation

American Coot clutches are relatively large, often somewhere around 6 to 12 eggs. Incubation lasts roughly three to three and a half weeks. The eggs are buff to pinkish with fine dark speckles. Both parents incubate.

Incubation often begins before the last eggs are laid, so the chicks hatch over several days rather than all at once. Coots are also known to lay eggs in the nests of other coots, a behavior called brood parasitism. Some pairs appear able to recognise and reject eggs that are not their own.

Brood care: how coots raise their chicks

Coot chicks are precocial, meaning they hatch with down and open eyes and can swim soon after hatching. Even so, they depend on their parents for food for several weeks. The chicks leave the egg nest within a day or so of hatching and follow the adults through the vegetation, returning to platforms to be brooded and warmed.

Parents often divide the brood, with each adult tending some of the chicks. Young coots typically reach flight at around seven to eight weeks old. In mid-summer you may see adults dipping a bill to pass food to a begging chick, while older siblings increasingly feed themselves.

When Is the Coot Nesting Season on the Prairies?

On the northern prairies, the American Coot nesting season generally runs from late spring into summer. Pairs settle on territories soon after ice-out, egg laying is concentrated in late spring and early summer, and chicks are on the water through summer. Exact timing shifts with latitude, spring weather and water levels. Pairs that lose a nest may try again, which stretches the season.

Coot Nesting Behaviour: Territory and Displays

Breeding coots are strongly territorial. They defend their patch of marsh against other coots, and sometimes against other waterbirds, with loud calls, displays and splashing chases. This is one of the most entertaining coot nesting facts for observers, because the action is easy to see from shore.

• Threat posture: head lowered, wings arched over the back and the white undertail fanned, making the bird look larger.
• Splattering: a coot rushes across the surface toward an intruder, beating its wings and kicking up spray.
• Fighting: in serious disputes, two coots may rear back on the water and strike with their feet.

When you see these displays, you have likely found a territory boundary. Marking it on a rough sketch of the pond helps you understand how many pairs a wetland supports.

Eurasian Coot Nesting and the UK Nesting Season

The Eurasian Coot nests in much the same way as the American Coot. It builds a bulky nest of plant material in or beside emergent vegetation in shallow water, and both parents share incubation and brood care. In the United Kingdom, the coot nesting season typically begins in early spring, often around March. Egg laying continues through spring and into summer, and some pairs raise more than one brood. Eurasian Coots readily use park lakes, reservoirs and canals, and sometimes nest in quite exposed spots close to people.

In the UK, the nests of wild birds are legally protected while in use. Watch nesting coots in parks from a respectful distance.

Seasonal Movements: Coots in Autumn and Winter

Most American Coots that breed on the northern prairies migrate south for winter. Before leaving, they often gather in large flocks, called rafts, on bigger lakes and marshes. These autumn rafts can be impressive, with hundreds or many more birds packed together, grazing on submerged plants and shoreline vegetation.

Coots generally migrate at night, so a lake full of coots one evening may be noticeably quieter the next morning. In autumn field notes, rough flock counts, weather and the date when the last coots leave give you a useful record from year to year.

How to Watch Coots on Your Next Outing

The simplest way to learn coot behavior is to choose one prairie wetland and visit it repeatedly through the seasons. These steps will help you get the most from each outing:

1. Pick a wetland with open water and emergent vegetation. A slough, pothole or marshy lake edge with a road, trail or viewing platform lets you watch without entering the marsh.
2. Bring simple gear. Binoculars, a field notebook and pencil, layered clothing for prairie wind, and insect protection in summer are enough. A spotting scope helps on larger lakes.
3. Arrive and wait quietly. Give the birds a few minutes to settle after you arrive. Coots that were hiding often return to open water.
4. Identify with a checklist. Confirm the white bill, dark body, head-pumping swim and, if visible, the lobed toes.
5. Watch one bird for several minutes. Note whether it surface feeds, upends, dives or grazes, and whether other birds interact with it.
6. Record the season’s clues. Write down displays, birds carrying nest material, chick sightings, juvenile plumage and flock sizes, with the date and water conditions.
7. Return in a few weeks. Comparing visits is where patterns emerge: territories forming, broods growing and flocks building before migration.

Watching Nesting Coots Respectfully

The kindest way to observe coot nesting is from outside the marsh, at a distance where the birds carry on normally. If an adult leaves the nest, calls in alarm or swims toward you in a threat display, you are too close. Step back.

• Stay on trails, roads and dikes rather than wading into emergent vegetation, which hides nests and is easily trampled.
• Keep dogs leashed near wetlands during the nesting season.
• Do not handle eggs or chicks. Chicks that appear alone are usually close to a parent hidden in the reeds.
• Use binoculars or a scope instead of moving closer for a better look or photo.
• Leave floating platforms, muskrat houses and shoreline vegetation undisturbed, since coots depend on them.

A patient hour at a prairie slough can be very rewarding. You may see the splash of a territorial chase, a coot carrying cattail stems, or a line of orange-headed chicks following an adult. Small observations like these, gathered season after season, build a real understanding of how coots live in prairie wetlands.