Rough-legged Hawk Bird Facts (Buteo lagopus)

Visual Identification

Appearance

The Rough-legged Hawk is a large raptor with distinctive feathered legs. It displays variable plumage, typically featuring dark brown upperparts and pale underparts with dark belly patches. The tail is white with a dark terminal band.

Like many raptors, two color morphs exist, with the light morph being more common; a white or cream-colored head, breast, and belly with a brownish-black body. Dark morph rough-legged hawks are mostly dark blackish-brown, with pale trailing edges to the underwing and a heavily barred tail.

In both plumage variations, a major feature is the ‘rough legs’, dense feathering that extends down the legs to the toes.

Males are generally lighter in color than females. In flight, this hawk shows dark 'wrist' patches on its pale underwings. Juveniles resemble adults but may have more streaking on the underparts.

Size

Length

46cm to 59cm

Wingspan

120cm to 153cm

Weight

715g to 1.4kg

Colours

Males and females have similar plumage

Primary Colour

Brown White

Secondary Colour

Black

Beak Colour

Black

Leg Colour

Yellow

Habitat and Distribution

Habitats

Woodland

The Rough-legged Hawk is not typically found in Woodland habitats.

Garden

The Rough-legged Hawk is not typically found in Garden habitats.

Wetland

The Rough-legged Hawk is not typically found in Wetland habitats.

Coastal

The Rough-legged Hawk is not typically found in Coastal habitats.

Urban

The Rough-legged Hawk is not typically found in Urban habitats.

Farmland

The Rough-legged Hawk is not typically found in Farmland habitats.

Grassland

The Rough-legged Hawk can be found in Grassland habitats.

Desert

The Rough-legged Hawk is not typically found in Desert habitats.

Tundra

The Rough-legged Hawk can be found in Tundra habitats.

Rainforest

The Rough-legged Hawk is not typically found in Rainforest habitats.

Mountain

The Rough-legged Hawk is not typically found in Mountain habitats.

Savanna

The Rough-legged Hawk is not typically found in Savanna habitats.

Distribution

Rough-legged Hawks breed in Arctic and subarctic regions across North America and Eurasia, favoring open tundra and taiga habitats. They nest on cliffs or rocky outcrops in these northern landscapes.

During winter, they migrate south to temperate regions. In North America, they can be found across the northern United States and southern Canada, frequenting open grasslands, prairies, and agricultural areas.

In the UK, they are scarce and occasional winter visitors when food sources are in particularly short supply further north in Scandinavia. Locations on the east coast of England and northeast Scotland offer the best opportunities for a sighting.

Elevation Range

Sea level to 1,200 meters

Climate zones

Subarctic, Temperate

Distribution Map

This map gives you a rough idea of where you might spot a Rough-legged Hawk. The coloured areas show countries where these birds have been seen.

A few things to keep in mind:

Birds might not be everywhere in the coloured areas, for example, they may be present around the coast of that country
Where birds live can change with seasons and available food
This map is quite simple - it doesn't show exact locations

We're working on making our maps even better! Soon, we hope to show you:

More detailed maps for bigger countries, including state and region
How birds move around during different seasons

Resident

Breeding

Non-breeding

Vagrant

Distribution by Region

Species that can be found in the area throughout the year

Bulgaria Canada Denmark Finland Georgia Greece Kazakhstan Norway Romania Russia Sweden Ukraine United States of America

Species that are present in the area during their breeding season

Saint Pierre and Miquelon

Species that are present in the area outside their breeding season

Albania Armenia Austria Azerbaijan Belarus Belgium Bosnia and Herzegovina China Croatia Czech Republic Estonia France Germany Hungary Iran Italy Japan Kyrgyzstan Latvia Lithuania Luxembourg Macedonia Mexico Moldova Mongolia Montenegro Netherlands North Korea Poland Serbia Slovakia Slovenia South Korea Switzerland Taiwan Tajikistan The United Kingdom Turkey Uzbekistan

Species that appear infrequently (rare) and unpredictably outside their normal range

Afghanistan Bermuda Bhutan Cyprus Faroe Islands Iceland Ireland Israel Jordan Lebanon Libya Liechtenstein Malta Spain Svalbard and Jan Mayen Islands Syria Tunisia

Behaviour and Ecology

Bird Attributes

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Bird Attributes Explained

Our bird attributes system rates various aspects of a bird's capabilities on a scale of 0-100, based on data from field observations, scientific studies, and expert knowledge.

Attribute Categories:

Agility: Manoeuvrability, speed, and grace in flight or movement.
Strength: Physical power, often correlating with size and hunting abilities.
Adaptability: Ability to thrive in various environments or changing conditions.
Aggressiveness: Territorial behaviour and assertiveness, particularly during breeding seasons.
Endurance: Stamina, often seen in migration patterns or foraging behaviours.

Understanding the Ratings:

0-20: Very Low
21-40: Low
41-60: Average
61-80: High
81-100: Very High

Remember, these attributes are relative to other bird species and don't necessarily indicate superiority.

Hover over the icon next to each attribute for more information.

Tap the icon next to each attribute for more information.

Agility 85

Agility

Reflects the bird's manoeuvrability, speed, and grace in flight or movement.

The Rough-legged Hawk demonstrates remarkable agility, particularly in its ability to hover motionless in the air whilst hunting. This unique skill, combined with its adeptness in long-distance migration, indicates a high level of aerial manoeuvrability.

Strength 70

Strength

Indicates the bird's physical power, often correlating with size and hunting abilities.

As a large raptor capable of carrying prey and constructing substantial nests, the Rough-legged Hawk possesses considerable strength. However, it's not amongst the most powerful of raptors, focusing more on smaller prey like rodents.

Adaptability 80

Adaptability

Represents the bird's ability to thrive in various environments or changing conditions.

This species shows impressive adaptability, breeding in harsh Arctic environments and wintering in varied temperate habitats. Its ability to thrive across a wide elevation range (sea level to 1,200 metres) further demonstrates its adaptable nature.

Aggressiveness 60

Aggressiveness

Measures the bird's territorial behaviour and assertiveness, particularly during breeding seasons.

Whilst capable predators, Rough-legged Hawks are generally less aggressive than some other raptor species. They're often solitary and relatively quiet, suggesting a moderate level of aggression primarily directed towards hunting rather than territorial disputes.

Endurance 90

Endurance

Reflects the bird's stamina, often seen in migration patterns or foraging behaviours.

The Rough-legged Hawk's endurance is particularly noteworthy. Its ability to undertake long-distance migrations of up to 2,700 miles (around 4,345 km), coupled with its hovering hunting technique which requires sustained effort, indicates exceptional stamina and endurance.

Diet

Rough-legged Hawks primarily feed on small mammals, especially lemmings and voles. During the breeding season, these rodents can make up to 80-90% of their diet. They also hunt other small animals like ground squirrels, rabbits, and hares.

Birds are also a key element in their spring and summer diet, with Lapland longspur, American tree sparrows, and ptarmigan the most commonly caught species.

Their hunting strategy involves hovering or perching to spot prey.

Behaviour

Rough-legged Hawks are known for their distinctive hovering behavior while hunting, often seen hanging motionless in the air with their legs dangling.

They are generally solitary but may gather in small groups during migration. These hawks are primarily diurnal and spend much of their time perched on poles or trees, scanning for prey.

Vocalisation

Rough-legged Hawks are generally quiet outside of the breeding season. During breeding, they produce a cat-like mew sound, described as a drawn-out 'kee-ow'.

Males may also make a rapid series of short whistles during courtship displays. Their calls are less frequent and softer compared to many other hawk species.

Nesting & Breeding

Rough-legged Hawks form monogamous pairs and typically breed once a year. The breeding season begins in May or June, coinciding with the abundance of prey in their Arctic habitats.

Nests are large structures made of sticks and lined with softer materials, often built on cliff ledges or rocky outcrops. Females lay 3-5 eggs, pale bluish-white with brown markings.

Incubation lasts about 31 days. The female primarily incubates while the male provides food. The chicks fledge after 5-6 weeks but may depend on their parents for several more weeks.

Conservation and Status

Global Conservation Status

Least Concern ^[1]

While currently listed as Least Concern, Rough-legged Hawks face threats from habitat loss due to climate change in their Arctic breeding grounds. They are also vulnerable to collisions with wind turbines and vehicles.

Conservation efforts focus on protecting their breeding and wintering habitats.

Population Data

Global Population Estimate

590,000 mature individuals ^[2]

Global Population Trend

^[3]

Trend data may be uncertain or fluctuating

Additional Information

Quick Facts

Other names:

Rough-legged Buzzard

Family:

Accipitridae

Average Lifespan

2 years

Max Lifespan

18.8 years ^[4]

Predators

Adult Rough-legged Hawks have few natural predators, but eggs and nestlings may fall prey to foxes, wolves, and other raptors like Golden Eagles or Gyrfalcons.

Did You Know?

Their scientific name 'lagopus' means 'hare-footed', referring to their feathered legs.
They are one of the few hawk species that can hover in place while hunting.
Rough-legged Hawks can travel over 2,700 miles (around 4,345 km) during migration.

References

1
website: BirdLife International. 2021. Buteo lagopus. The IUCN Red List of Threatened Species 2021: e.T22695973A202640529.
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3
report, 2020: Partners in Flight
2
website, 2020: Partners in Flight
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4
website, 2010: Fransson et al., EURING list of longevity records for European birds
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