Sharp-tailed Grouse (Tympanuchus phasianellus)

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Image of a Sharp-tailed Grouse in its natural habitat
Birds Grouse

Introduction

The Sharp-tailed Grouse (Tympanuchus phasianellus) is a medium-sized grouse of open landscapes across much of Canada, Alaska and the northern and western United States. It is best known for the spring courtship displays performed by males on traditional open areas called leks. The species is generally resident, although local and seasonal movements occur in response to snow, food and habitat conditions.

Physical Description

Sharp-tailed Grouse are stocky, chicken-shaped birds with short legs, a small head and a short bill. Adults are generally 38–48 cm long, with a wingspan of approximately 62–65 cm and a typical mass of about 596–880 g, although size varies among populations and seasons.

The plumage is mottled brown, buff, black and white. The head, neck, back and wings are heavily barred, while the breast and upper belly are pale with small, dark V-shaped markings. White spots are visible on the upper surface of the wings. The tail is wedge-shaped, with elongated central feathers that form the characteristic sharp point.

The sexes are similar, but males are usually slightly larger. During the breeding season, males display yellow superciliary combs and inflatable purplish or pinkish air sacs on the sides of the neck. Females generally have less conspicuous facial ornaments and different barring on the central tail feathers. Juveniles resemble duller females and develop adult plumage as they mature.

Range and Habitat

The species occurs across much of Canada and Alaska, extending south into parts of the northern and western United States. Its distribution is uneven, with isolated or localised populations in some eastern and western areas. Recognised geographic forms include prairie, boreal and montane populations, and some regional subspecies have experienced substantial declines or range contraction.

Sharp-tailed Grouse use open grasslands, native prairie, shrublands, brushy openings, parklands, agricultural areas and open habitats within or near boreal forest. In Alaska and other northern regions, they may also occupy spruce bogs, birch-aspen parklands, muskeg and scrubby woodland. Breeding leks are usually located on relatively open, elevated or sparsely vegetated ground.

The species is not considered a long-distance migrant. Individuals may move locally or seasonally between breeding, brood-rearing and winter habitats. In winter, they can feed in wooded or shrubby areas and may roost beneath the snow, which provides insulation and protection from severe weather.

Behaviour and Diet

Sharp-tailed Grouse feed mainly on plant material, including grass and forb seeds, grains, buds, catkins, berries and other vegetative parts. Insects are particularly important for chicks and may also be taken by adults when available. Seasonal diet varies with local habitat and weather; winter foods can include birch and other woody vegetation.

In spring, males gather on traditional leks before sunrise. They lower their bodies, raise their pointed tails, stamp their feet rapidly, rush or circle, click their tail feathers and produce low cooing sounds while inflating their neck air sacs. Females visit the lek, observe the displays and select mates. Males do not provide parental care.

Females nest on the ground, usually in concealed vegetation near suitable feeding and brood-rearing habitat. The young leave the nest soon after hatching and are led by the female. Sharp-tailed Grouse may form groups outside the breeding season, especially where food and cover are concentrated.

Some Indigenous communities have longstanding cultural associations with Sharp-tailed Grouse. In particular, elements of the species’ spring displays have influenced traditional dances in some Native American communities. These relationships vary among nations and communities and should be understood in their specific cultural contexts.

Identification Tips

Look for a round, chicken-like grouse with a small head, short legs, mottled brown-and-white plumage and a pointed, wedge-shaped tail. The elongated central tail feathers are often the most obvious feature when the bird is standing or flying.

Useful field marks include:

  • White lower belly and undertail coverts.
  • Small dark V-shaped markings on the upper breast and belly.
  • White spots on the upper wings.
  • A short crest and relatively short bill.
  • Purple or pinkish neck air sacs and yellow facial combs on displaying males.

The species can be confused with Greater Prairie-Chicken and Lesser Prairie-Chicken. Sharp-tailed Grouse generally show a more distinctly pointed tail and brown V-shaped markings on the pale underparts, whereas prairie-chickens have more strongly barred underparts. A displaying male Sharp-tailed Grouse has purplish air sacs, unlike the yellowish or orange air sacs of prairie-chickens. Ring-necked Pheasants may also appear similar at a distance, but they are typically longer-tailed and have different body patterning and proportions.

Conservation Status

The Sharp-tailed Grouse is currently assessed as Least Concern globally. This status does not mean that all populations are secure. The species has declined from historical abundance in many areas, and some regional populations are of conservation concern.

The principal threats are the loss, fragmentation and degradation of grassland, shrubland and open woodland habitats. Agricultural conversion, urban and energy development, woody encroachment, wetland drainage, invasive vegetation, inappropriate grazing or fire regimes, pesticides and disturbance near leks can all reduce habitat quality. Climate change may alter vegetation, snow conditions, breeding success and the distribution of suitable habitat.

Important conservation measures include protecting and restoring native grasslands, maintaining a suitable mixture of nesting and brood-rearing cover, conserving winter habitat, managing woody encroachment where appropriate, and protecting traditional leks from disturbance. Conservation Reserve and other grassland restoration programmes have benefited habitat in parts of the United States. Effective management should be adapted to the needs of local populations and subspecies.

Frequently Asked Questions

Where does the Sharp-tailed Grouse live?

It occurs across much of Canada and Alaska and in parts of the northern and western United States. It uses grasslands, prairie, shrublands, agricultural landscapes, parklands and open boreal habitats.

Is the Sharp-tailed Grouse migratory?

It is generally a resident species rather than a long-distance migrant. Local or seasonal movements may occur between breeding, feeding and wintering areas.

What does the Sharp-tailed Grouse eat?

Its diet includes seeds, grains, buds, catkins, berries and other plant material. Insects are especially important to chicks and are also eaten by adults when available.

What is a Sharp-tailed Grouse lek?

A lek is a traditional open display area where males gather during the breeding season. They perform vigorous dances, stamp their feet, click their tails and inflate their neck air sacs to attract females.

How can Sharp-tailed Grouse be identified?

The combination of mottled brown-and-white plumage, a pointed central tail, white undertail coverts and small V-shaped markings on the pale underparts is distinctive. Displaying males also show purplish neck air sacs and yellow facial combs.

Is the Sharp-tailed Grouse endangered?

The species is currently classified globally as Least Concern, but habitat loss and fragmentation have caused declines in many regions. Some local populations and subspecies require targeted conservation attention.

References

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