Heron vs Crane: How to Tell These Tall Birds Apart

Key differences at a glance

Herons and cranes are both tall, long-legged birds of wetlands, and in North America the great blue heron and the sandhill crane are confused all the time. In Europe the same mix-up happens between the gray heron and the common crane.

Despite their looks, they are not close relatives. Herons belong to the family Ardeidae in the order Pelecaniformes, alongside ibises and pelicans. Cranes belong to the family Gruidae in the order Gruiformes, alongside rails and coots. Their similar shape is an example of convergent evolution: unrelated animals evolving a similar body plan for a similar way of life.

Flight: the neck tells you

From a distance, flight is the clearest clue. Herons pull the neck back so the head rests between the shoulders, giving them a short-necked, hunched outline. The long legs trail behind. Their wingbeats are slow, deep and steady.

Cranes stretch the neck and head straight forward and the legs straight back, so the bird looks like a long, thin cross in the sky. Their wingbeat has a distinctive rhythm, a smooth downstroke followed by a quick upward flick. Cranes also soar on rising warm air for long periods, often circling high in flocks, which herons do much less.

Storks, ibises and spoonbills also fly with outstretched necks, so a folded neck is the single best sign that you are looking at a heron, egret or bittern.

Head, bill and tail shape

A heron’s bill is long, heavy and pointed like a dagger, often yellowish, and it is built for grabbing fish. Great blue herons also have black plumes running back from the eye and shaggy plumes on the neck.

A crane’s bill is shorter and slimmer, roughly as long as the head, and usually dark. Adult sandhill and common cranes have a patch of bare red skin on the crown or forehead, something no North American or European heron has.

Look at the back end, too. Cranes have long, drooping inner wing feathers that hang over the tail like a bustle. Herons have a neat, short tail with no bustle. Cranes also have a small, raised hind toe, which is why most cranes do not perch in trees, while herons grip branches easily and often stand on treetops.

Diet and feeding

Herons are carnivores and patient ambush hunters. They stand still or wade slowly in shallow water and strike at fish, frogs, crayfish, snakes and small mammals with their bills. For a full menu, see What do herons eat?

Cranes are omnivores. They walk steadily through wet meadows, marshes and farm fields, probing the soil and picking up food: grain such as corn and wheat left after harvest, seeds, roots, tubers and berries, plus insects, worms, snails, small rodents, frogs and snakes. During migration, sandhill cranes rely heavily on waste corn in fields.

Nesting and family life

This is where the two groups differ most.

Herons nest in colonies called heronries, building stick platforms high in trees. Great blue herons lay usually 3–6 pale blue eggs. The chicks are helpless at first and stay in the nest for about two months, fed by both parents. Most great blue herons take a new mate each year.

Cranes nest as single pairs on the ground, building a mound of plant material in a marsh, bog or wet meadow. They usually lay just two brownish, spotted eggs. The chicks, called colts, are covered in down and can walk out of the nest within a day of hatching. They stay with their parents for about 9–10 months and migrate with them. Sandhill crane pairs usually stay together for many years and strengthen their bond with elaborate dances, explained in Why do cranes dance?

Voice and flocking

Herons are mostly quiet. A great blue heron gives a deep, hoarse croak when disturbed, and colonies are noisy with squawks and bill-clattering, but a hunting heron is usually silent.

Cranes are among the loudest birds in the world. Their long windpipe, coiled inside the breastbone, produces a rolling, trumpeting call that can be heard several kilometers away. Pairs call together in a duet known as a unison call.

Herons usually hunt and travel alone or in small groups. Cranes live in pairs and families and gather in huge flocks during migration. Several hundred thousand sandhill cranes stop along the Platte River in Nebraska each spring, and in Europe tens of thousands of common cranes gather at sites such as Lake Hornborga in Sweden and Lac du Der in France. Learn more in Where do sandhill cranes migrate?

Which is bigger?

In North America, the sandhill crane is usually the heavier bird, often weighing 3–5 kg (6.6–11 lb) compared with about 2–2.5 kg (4.4–5.5 lb) for a typical great blue heron. Their heights and wingspans overlap, so size alone is not a reliable clue.

In Europe, the difference is clearer. The common crane is 100–130 cm (39–51 in) long and weighs 3–6.1 kg (6.6–13.4 lb), much heavier than the gray heron at about 1–2 kg (2.2–4.4 lb).

Why many people call herons cranes

Calling a heron a crane is extremely common. In many parts of the United States, people say “crane” for any tall wading bird, and in Ireland the gray heron is widely known as a crane. One likely reason is that, for many people, herons are far more familiar: they live near almost every pond and river, while cranes are absent from many regions or seen only in passing during migration.

There are real cranes in both continents, though. North America has the sandhill crane and the rare whooping crane; Europe has the common crane, which is returning as a breeding bird to parts of western Europe, including Britain and, since 2021, Ireland. If the bird is standing in a dry field in a noisy flock, it is probably a crane. If it is standing alone and silent at the water’s edge, it is almost certainly a heron.