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Ruffed Grouse
Pheasants & Grouse · Resident

Ruffed Grouse

Partridge · Bonasa umbellus

Least Concern41–50 cm · 450–750 g

By the Birdfact teamChecked byNathan Cope

This forest-dwelling drummer puts on a thunderous show, using its wings to create a deep, rhythmic beat that echoes through North American woodlands.
On this page11 sections
  1. How to recognise it
  2. Its size
  3. Its song and calls
  4. When and where to see it
  5. What it eats
  6. Nesting and breeding
  7. Behaviour
  8. Conservation
  9. More photos
  10. Quick facts
  11. Sources

How to recognise it

The Ruffed Grouse is a medium-sized game bird with mottled brown, black, and grey plumage. It has a small crest, a fan-shaped tail with a dark band, and feathered legs. The bird's most distinctive feature is the dark ruff of feathers around its neck.

Both sexes look similar, with slight variations in coloration - females are usually less vivid and have smaller ruffs. Some individuals may have a more reddish-brown or greyish overall appearance, depending on their habitat and region.

Its size

Adults
Length
41–50 cm
Wingspan
50–64 cm
Weight
450–750 g

Its song and calls

Ruffed Grouse are generally quiet birds, but they produce a variety of soft clucks, whines, and peeps.

Their most distinctive sound is not vocal but mechanical - the male's drumming display. This sound starts slowly and builds to a rapid crescendo, often described as an accelerating 'thump-thump-thump'.

When and where to see it

North America

OctoberPeak season

Arriving in 1 placeLast month in 2 places

Most recorded in October

  1. 1. Yukon Territory0.68%
  2. 2. Northwest Territories0.50%
  3. 3. Manitoba0.39%
  4. 4. New Brunswick0.36%
  5. 5. Prince Edward Island0.35%

Each dot is a county, state or province: the bigger and darker, the larger the bird’s share of that place’s bird records that month. Grey dots: no regular records. The ringed point is the centre of the bird’s records this month; the arrow shows how it moved since last month, and the dashed loop its path through the year. “Arrivals” colours places where it becomes regular this month (orange) or is in its last regular month (grey). GBIF eBird Observation Dataset, 2019–2024. Map data: Natural Earth, US Census Bureau; place centres © OpenStreetMap contributors.

In your area

See when the Ruffed Grouse is recorded in your county, state or province.

or

How often the Ruffed Grouse turns up in the United States and Canada through the year, from birdwatchers' records.

United States

Resident · all year · most records in May

Canada

Resident · all year · most records in April

Regularly recordedOccasionalBar height: share of all bird records that month
Show as a table
MonthUnited StatesCanada
January0.015% (regular)0.20% (regular)
February0.018% (regular)0.20% (regular)
March0.014% (regular)0.15% (regular)
April0.029% (regular)0.26% (regular)
May0.040% (regular)0.25% (regular)
June0.034% (regular)0.16% (regular)
July0.020% (regular)0.10% (regular)
August0.013% (regular)0.086% (regular)
September0.019% (regular)0.14% (regular)
October0.025% (regular)0.24% (regular)
November0.018% (regular)0.22% (regular)
December0.015% (regular)0.23% (regular)

Worldwide: recorded regularly in 2 countries

Countries where it was recorded in at least 3 of the 6 years 2019–2024. Linked countries have their own bird list.

North America (2)

Tips for seeing it

  • Listen for the male's drumming sound in spring, which can be heard up to a quarter-mile away
  • Look for them in dense, mixed forests with plenty of understory
  • Be patient and move slowly, as they often freeze in place when threatened
  • In winter, search for their distinctive snowshoe-like tracks in snowy areas

What it eats

Ruffed Grouse have a varied diet that changes seasonally. In spring and summer, they consume leaves, buds, and insects. During fall and winter, they primarily feed on berries, nuts, and tree buds.

They have a specialized digestive system that allows them to eat fibrous plant material.

Nesting and breeding

Ruffed Grouse breeding season begins in early spring. Males attract females through drumming displays, but they do not form lasting pair bonds.

Females create a shallow depression on the ground, often at the base of a tree or stump, lined with leaves and grass. They typically lay 9-14 cream-colored eggs with brown speckles.

Incubation lasts about 24 days, carried out solely by the female. Chicks are precocial, leaving the nest within 24 hours of hatching and can fly short distances after 10-12 days.

Behaviour

Ruffed Grouse are known for their explosive takeoff when startled, creating a loud whirring sound with their wings. They are primarily ground-dwelling birds but can fly short distances through dense forests.

During mating season, males perform a distinctive drumming display by rapidly beating their wings while standing on a log.

Conservation

While the Ruffed Grouse is currently listed as Least Concern, some populations have experienced declines due to habitat loss and fragmentation. 

Conservation efforts focus on maintaining diverse forest habitats and promoting sustainable forestry practices that benefit the species.

More photos

4 photos

Quick facts

Length
41–50 cm
Wingspan
50–64 cm
Weight
450–750 g
Lifespan
1–3 years · oldest recorded 11 years
Migration
Resident
Global status (IUCN)
Least Concern
World population
18,000,000 mature individuals
Population trend
Population slightly decreasing due to habitat loss and hunting, but considered stable due to their large population size
Also called
Partridge
Scientific name
Bonasa umbellus

Sources

3
  1. 1BirdLife International. 2021. Bonasa umbellus. The IUCN Red List of Threatened Species 2021: e.T22679500A139379109. Source (opens in a new tab)
  2. 2Pardieck et al. (2018)
  3. 3Partners in Flight (2019) Source (opens in a new tab)
Spotted a mistake?Tell usHow we write and checkBy the Birdfact team · Updated

Checked by

Nathan Cope, founder and editor

Nathan founded Birdfact and leads its writers and contributors in the UK, the US and Canada. He has watched and studied birds for more than ten years, and checks every article and species guide before it’s published.

How we write and checkAbout Nathan