Black-necked Stilt (Himantopus mexicanus)

With impossibly long pink legs, crisp black-and-white plumage, and a needle-thin bill, the Black-necked Stilt is one of the most distinctive shorebirds in North America.

These graceful birds patrol shallow marshes, mudflats, ponds, and flooded fields in search of tiny aquatic prey. Their delicate appearance can be misleading, though. During nesting season, Black-necked Stilts become noisy and surprisingly fearless defenders of their territory.

Along the Gulf Coast, they are a familiar sight wherever shallow water creates good feeding habitat.

Quick Facts

Common Name	Black-necked Stilt
Scientific Name	Himantopus mexicanus
Family	Recurvirostridae
Order	Charadriiformes
Length	13.8–15.3 in (35–39 cm)
Wingspan	28.1–29.7 in (71.5–75.5 cm)
Weight	5.3–6.2 oz (150–176 g)
Diet	Aquatic insects, crustaceans, tadpoles, snails, and small fish
Habitat	Shallow marshes, mudflats, ponds, salt flats, lagoons, and flooded fields
Range	Western, southern, and coastal North America south through parts of Central and South America
Conservation Status	Least Concern

How to Identify a Black-Necked Stilt

Few North American shorebirds are easier to recognize.

An adult Black-necked Stilt has a mostly black back, wings, and rear neck sharply contrasted against a white belly and breast. A white patch surrounds the eye, while an extremely thin, straight black bill extends from the small head.

Then there are those legs.

The extraordinarily long legs are bright pink to reddish-pink and account for much of the bird’s height. In proportion to body size, stilts have some of the longest legs in the bird world, surpassed only by flamingos.

Males and females look similar, although females often have a browner back while males tend to be darker and glossier black. Immature birds may also have browner upperparts with pale edging on some feathers.

In flight, the long pink legs trail well beyond the tail, giving the bird an unmistakable silhouette.

Diet and Feeding

Black-necked Stilts spend much of their day slowly walking through shallow water while searching for small prey.

Their diet includes:

• Aquatic insect larvae
• Flies and beetles
• Brine shrimp
• Crayfish and other small crustaceans
• Snails
• Tadpoles
• Very small frogs
• Small fish

They usually capture prey with quick pecks at or just below the water’s surface. Stilts may also sweep their bills from side to side through the water, somewhat like their close relative, the American Avocet.

Small fish sometimes get a more energetic pursuit. Stilts can chase them toward very shallow water where escape becomes more difficult.

Habitat and Range

Black-necked Stilts are birds of open, shallow wetlands.

They can be found around freshwater and saltwater habitats, including marshes, mudflats, salt ponds, shallow lagoons, flooded agricultural fields, drainage areas, evaporation ponds, and other wetlands with relatively little dense vegetation.

They occur along much of the Pacific, Atlantic, and Gulf coasts as well as scattered inland wetlands across western and southern North America. Many inland populations migrate south during winter, while birds in warmer coastal regions may remain much closer to their breeding areas.

On the Texas Gulf Coast, Black-necked Stilts are common summer residents and can take advantage of both natural wetlands and human-created shallow-water habitats.

That adaptability means a productive birding spot does not necessarily need to look pristine. A shallow drainage area or flooded field can sometimes hold an impressive collection of stilts and other shorebirds.

Behavior

At first glance, a feeding Black-necked Stilt appears almost dainty. It walks deliberately through shallow water, lifting each long leg high before carefully placing it down again.

That calm demeanor changes dramatically when a nest or chick is threatened.

Black-necked Stilts become extremely vocal around intruders, flying overhead while giving repeated sharp calls. Several nesting birds may join together to confront a predator.

They even perform what researchers have called a “popcorn display.” A group surrounds a ground predator while jumping, hopping, flapping, and calling in an effort to drive it away.

Adults may also use distraction displays to draw attention away from nests or chicks.

If a Black-necked Stilt suddenly goes from quietly feeding to loudly yelling at you, there is a good chance you have wandered too close to its family.

Nesting and Life History

Black-necked Stilts usually nest on the ground close to water, sometimes in loose colonies.

Both members of a pair help select the nest site and construct the nest. The basic structure may be little more than a shallow scrape in sand, mud, or other soft substrate. Pebbles, shells, grasses, mud chips, and other nearby materials may be added as lining.

A typical clutch contains 2–5 eggs, and both parents participate in incubation. Incubation generally lasts about three to four weeks.

The chicks are precocial, meaning they hatch covered in down with their eyes open and are soon capable of moving around on their own. They may begin walking within only a few hours of hatching.

Although the chicks can feed themselves, their parents continue protecting them while they grow.

A family of tiny, fuzzy stilt chicks standing on disproportionately enormous legs may be one of nature’s better arguments that evolution has a sense of humor.

Conservation Status

The Black-necked Stilt is currently considered a species of Least Concern. It remains widespread and can use a surprising variety of natural and artificial wetlands.

Wetland conservation is still important for the species. Changes in water levels, habitat destruction, contamination, disturbance around nesting colonies, and loss of shallow feeding areas can affect local populations.

The Hawaiian form of the Black-necked Stilt is a separate conservation concern and is much rarer than mainland populations.

Fun Facts About Black-Necked Stilts

• Their legs are among the longest relative to body size of any bird, second only to flamingos.
• Their toes are partially webbed, so Black-necked Stilts can swim, although they usually prefer wading.
• Adults can become surprisingly aggressive when protecting nests and chicks.
• Several nesting stilts may cooperate to mob a potential predator.
• Black-necked Stilts and American Avocets belong to the same family, Recurvirostridae.
• Rare hybrids between Black-necked Stilts and American Avocets have even been documented.
• Black-necked Stilts are quite willing to use artificial wetlands, including flooded agricultural areas and evaporation ponds.
• Their sharp alarm call can make these elegant-looking birds seem considerably less elegant once they decide you need to leave.

Frequently Asked Questions

Are Black-necked Stilts rare?

No. Black-necked Stilts are relatively common in suitable wetland habitat across much of their range, particularly in western and southern regions of North America and along the Gulf Coast.

Why are a Black-necked Stilt’s legs so long?

Their long legs allow them to forage in water that would be too deep for many smaller shorebirds while keeping most of their body safely above the surface.

Can Black-necked Stilts swim?

Yes. Their feet are partially webbed and they are capable of swimming, although they spend far more time walking through shallow water.

What do Black-necked Stilts eat?

They primarily eat small aquatic animals, including insects, crustaceans, snails, tadpoles, and tiny fish.

Where do Black-necked Stilts nest?

They nest on the ground near shallow water, often on small islands, raised patches of soil, dikes, or sparsely vegetated areas within wetlands.

Why is a Black-necked Stilt yelling at me?

You may be too close to a nest or young birds. Nesting stilts loudly mob potential predators—including people—and may perform distraction displays to draw attention away from their chicks.

Naturalist’s Note

There is something slightly ridiculous about the proportions of a Black-necked Stilt. The body looks almost too small for those extraordinarily long pink legs, yet the entire design works beautifully once the bird begins moving through shallow water.

They are also a wonderful reminder that appearance tells only part of an animal’s story. A quietly feeding stilt can seem delicate and almost fragile. Approach a nesting area, however, and that same bird can transform into a loud, determined defender willing to challenge something many times its own size.

For photographers, that behavior is useful information. Persistent alarm calls, circling adults, or distraction displays are signs that it is time to increase your distance. Giving the birds room not only protects nests and chicks; it often results in better photographs as the adults return to their normal behavior.

And with those pink legs reflected against calm Gulf Coast water, they really do not need much help looking spectacular.

Similar Species

The Black-necked Stilt’s pink legs and bold black-and-white pattern make adults difficult to confuse with most Gulf Coast shorebirds. A few species are worth comparing:

• American Avocet – The closest look-alike in overall shape. Avocets have a noticeably upturned bill and blue-gray legs rather than bright pink ones. Breeding adults also develop a rusty-colored head and neck.
• Greater Yellowlegs – Another tall, long-legged shorebird, but its legs are yellow and its plumage is mottled gray rather than boldly black and white.
• Lesser Yellowlegs – Slim and long-legged but considerably less dramatic in coloration, with yellow legs and gray-brown plumage.
• Willet – A stockier gray shorebird with much shorter legs. In flight, its striking black-and-white wing pattern can attract attention, but a standing Willet looks very different from a stilt.