Double-crested Cormorant Field Guide: Identification, Range and Plumage

The Double-crested Cormorant is a large, dark waterbird. It sits low in the water with its hooked bill tilted upward and has bare orange-yellow skin at the base of the bill. In flight it holds its neck with a slight kink. Adults are glossy black with turquoise eyes. Juveniles are brown with a pale neck and breast. Males and females look alike. It breeds across much of North America, including the prairie lakes of the Great Plains and the Great Lakes shores of Michigan and Ohio. This guide explains what to look for, why each clue matters, and how to use it on your next walk along the shore.

How do you identify a Double-crested Cormorant?

You can identify a Double-crested Cormorant by combining shape, posture and a few field marks. Field marks are the visible features that separate one species from similar ones. No single feature settles it on its own, so look for several together. Check these in order:

Size and shape: a long-bodied, goose-sized bird, roughly 70–90 cm (28–35 in) long, with a wingspan of about 114–123 cm (45–48 in). It has a long neck, a medium-length tail and a thin bill with a hooked tip.
Facial skin: bare orange-yellow skin on the throat pouch and in front of the eye. The pouch looks rounded at its rear edge. This patch is often the easiest feature to see at a distance.
Swimming posture: the body rides low, sometimes with only the neck and head above water, and the bill points slightly upward.
Diving: it slips under the surface and chases fish using its feet, often staying down long enough that you lose track of where it will come up.
Wing-spreading: after fishing, it often perches on a rock, snag or buoy with its wings held open to dry.

Wing-spreading matters for identification because few other prairie waterbirds pose this way. A dark bird standing upright with open wings on a dead tree over a lake is very likely a cormorant.

What does a Double-crested Cormorant look like when flying?

A Double-crested Cormorant in flight shows a long, dark body with a small kink in the neck, so the head sits slightly above the line of the body. Its wings are broad and steady, and its tail is fairly long. Birders often describe the shape as a flying cross. It flaps steadily with occasional short glides. Groups often travel in loose lines or V-shaped flocks low over the water or high between lakes.

The flight silhouette is useful when birds pass too far away to show any color. A flock of dark birds in a V can look like geese at first glance. Cormorants are quieter, and their necks are kinked rather than straight. Loons fly with the neck held straight and the head often slightly drooped, and they flap faster. On an open prairie sky with the sun behind the birds, shape is often all you have. Practicing on known cormorants builds that recognition.

What do adult Double-crested Cormorants look like through the seasons?

Adult plumage in the Double-crested Cormorant is black with a greenish gloss. The back and upper wings look bronze or coppery, and each feather has a dark edge that gives a scaly pattern in good light. The eye is a striking turquoise. This adult look is usually reached in the bird's third year or later.

Breeding season: where the name comes from

In spring, breeding adults grow two small tufts of feathers, one behind each eye. These are the double crests that give the species its name. On birds in the interior and the East, including prairie lakes, the crests are usually dark and can be hard to see. On some birds along the Pacific coast they are whitish. The facial skin also looks brighter in breeding season, and the inside of the mouth turns blue, which you may see when a bird opens its bill.

After the breeding season

By late summer the crests wear off or are molted, and adults look plainer. If you see a dark cormorant without visible crests in August or September, that is normal. Use the orange facial skin, posture and flight shape instead.

How do you recognize a juvenile Double-crested Cormorant?

A juvenile Double-crested Cormorant is brown rather than black, with a pale neck and upper breast. The pale areas range from whitish to buff, and the belly is darker. Juvenile plumage varies a lot between individuals. Some young birds look strongly two-toned, while others are a fairly even dull brown. The orange-yellow facial skin is present but often duller than on adults, and the eye is darker.

Immature birds in their second year are often patchy, with a mix of brown and black feathers. You will see this mottled look on prairie lakes through summer. Many younger birds wander or loaf near colonies without breeding. Pale-breasted cormorants can surprise new birders, who may wonder whether they are a different species. On most interior lakes, a brown, pale-chested cormorant with an orange throat is simply a young Double-crested.

Can you tell a male from a female Double-crested Cormorant?

Male and female Double-crested Cormorants cannot be reliably told apart in the field because they have the same plumage. Males average slightly larger than females. That difference is too small to judge on a single bird at a distance. Two birds side by side at a nest may show a size difference, but this is a hint, not a rule.

Instead of guessing sex, note behavior in your field notes. At colonies you may see birds bringing sticks, displaying with raised wings, or taking turns at the nest. Recording what birds do is more useful and more accurate than labeling them male or female.

What is the range of the Double-crested Cormorant?

The Double-crested Cormorant is found across much of North America, with breeding populations in three broad areas:

the interior, from the prairie provinces and Great Plains to the Great Lakes
the Atlantic and Pacific coasts
the south, including Florida, parts of the Caribbean and Mexico

Northern interior birds are migratory. They leave frozen lakes in fall and winter farther south, especially along the Gulf and southern Atlantic coasts and in the Mississippi River valley. Birds on milder coasts may stay year-round.

Double-crested Cormorants on prairie lakes

On prairie lakes, Double-crested Cormorants typically arrive in spring as ice clears and stay through the warm months. They nest in colonies. Nests may be on the ground on low islands, or in trees and snags, sometimes near American White Pelicans or gulls. Many birds head south from late summer through fall, and the number of migrants on a lake can change quickly from week to week. A lake that seemed empty one morning may host a large raft of birds the next.

Double-crested Cormorants in Michigan

In Michigan, Double-crested Cormorants are most familiar along the Great Lakes shores and islands, especially Lake Michigan and Lake Huron. They also visit inland lakes and rivers. Great Lakes populations fell sharply in the mid-1900s, in part because the pesticide DDT thinned eggshells. They recovered strongly after DDT was banned and the species gained federal protection in the early 1970s. Most Michigan birds are present from spring to fall. A few may linger on open water in winter.

Double-crested Cormorants in Ohio

In Ohio, Double-crested Cormorants are most common around Lake Erie, where some islands host breeding colonies. Inland, they appear on reservoirs, rivers and large lakes, especially during spring and fall migration. Small numbers may stay through winter where water remains open. Large flocks moving along the Lake Erie shoreline in fall are a good chance to study flight shape.

How does the Double-crested Cormorant compare with similar birds?

The Double-crested Cormorant is most often confused with other dark, long-necked waterbirds. The table compares the birds you are most likely to weigh against it in North America.

Species	Key differences from Double-crested Cormorant	Where the confusion happens
Neotropic Cormorant	Smaller, with a proportionally longer tail. The throat patch ends in a point at the rear and may have a thin white border in breeding season. Little or no orange skin in front of the eye.	Southern plains and the Gulf region, sometimes farther north
Common Loon	Thicker, dagger-like bill without a hook. In flight the neck is straight, not kinked, and the feet trail behind. Breeding adults have a checkered black-and-white back.	Northern lakes, especially during migration
Anhinga	Sharp, pointed bill, not hooked. Very long tail, silvery wing markings, and often soars on flat wings.	Southern wetlands
Canada Goose (distant flocks)	Pale breast and white chin strap. Honking calls. Neck held straight in flight.	Distant V-shaped flocks over prairie lakes

How to observe a Double-crested Cormorant on your next outing

A calm, prepared visit to a prairie lake makes cormorants easy to study. These steps help you turn a quick sighting into useful observations:

Pack simply. Bring binoculars, and a spotting scope if you have one, for distant rafts and islands. Add a small notebook, a pencil that works in damp air, and layers for prairie wind, which can feel cold on open water even in summer.
Choose a vantage point. Look for a spot with a wide view of open water, snags or rocky points where birds perch to dry. Having the sun behind you shows the orange facial skin and the bronze back.
Start with shape and posture. Before reaching for colors, note how the bird sits in the water, the angle of its bill, and how it dives.
Check the face. Look for the orange-yellow throat skin and the eye color: turquoise on adults, darker on young birds.
Sort ages. Count black adults and brown, pale-breasted juveniles separately. The ratio often shifts through summer as young birds appear.
Watch them fly. When birds take off, notice the kinked neck and flock pattern so you can recognize them later at a distance.
Write a short field note. Record the date, time, weather, location, number of birds, ages, and behaviors such as fishing, wing-spreading or carrying nest material.

Over a season, these notes show patterns: when birds arrive, when crests disappear, when juveniles show up, and when flocks leave in fall.

How can you watch cormorants respectfully?

Watching Double-crested Cormorants respectfully means keeping enough distance that the birds carry on with normal behavior. If birds stop feeding, stand up, crane their necks toward you or flush from perches, you are too close and should back away slowly.

Distance matters most at nesting colonies. Adults that flush leave eggs and chicks exposed to sun, cold and predators such as gulls. View colonies from shore or from a boat held well offshore, and do not land on nesting islands during the breeding season. Keep dogs leashed near shorelines. Carry out fishing line and litter, which can entangle diving birds. A patient observer who stays quiet and still will often see more natural behavior than one who tries to get closer.