Ruff

About

The Ruff is a medium-sized wading bird, famous for the elaborate breeding plumage of the male, which includes a large ruff of feathers and ear tufts. This species exhibits extreme sexual dimorphism during the breeding season, with males being significantly larger and more ornate than females (known as 'Reeves'). They are highly migratory, breeding in the Arctic and sub-Arctic regions of Eurasia and wintering in warmer climates, primarily Africa, but also parts of southern Asia and Australia.

Size & lifespan

Length

20-32 cm (7.9-12.6 in)

Wingspan

46-59 cm (18-23 in)

Weight

Male: 110-250 g (3.9-8.8 oz), Female: 70-170 g (2.5-6.0 oz)

Lifespan

Up to 10 years in the wild

Diet

Omnivore (primarily invertebrates, some plant material)

Physical characteristics

Plumage

Non-breeding plumage: Upperparts are grey-brown with darker streaking, underparts are white. Breeding male plumage is highly variable and elaborate, featuring a large ruff of feathers around the neck and ear tufts, which can be black, white, chestnut, rufous, barred, or mottled. The back and scapulars are also highly variable in color, often rufous, chestnut, or black with intricate patterns. Breeding female (Reeve) plumage is duller, typically grey-brown with some darker markings, but can show hints of rufous on the breast.

Beak shape

Medium-length, straight to slightly decurved, dark bill, often with a paler base in non-breeding birds.

Eye color

Dark brown

Leg color

Variable, typically yellowish, orange, or greenish-grey; can be duller in non-breeding birds.

Distinguishing features

The elaborate ruff and ear tufts of breeding males are unmistakable. In non-breeding plumage, the combination of medium size, relatively long neck, small head, and often yellowish legs helps distinguish it. The scaly pattern on the back of juveniles is also distinctive.

Juvenile appearance

Juveniles have a distinctive 'scaly' appearance on their upperparts due to dark feather centers and pale fringes. The breast and flanks are often washed with buff or rufous. Legs are typically yellowish-orange.

Seasonal changes

Non-breeding plumage is much plainer, with grey-brown upperparts and white underparts, lacking the elaborate ruffs and ear tufts of breeding males. Males undergo a dramatic molt into their breeding finery, which is then shed for the plainer non-breeding plumage.

Sexual dimorphism

Extreme during breeding season: males are significantly larger, with elaborate ruffs and ear tufts of highly variable colors. Females (Reeves) are smaller and lack these ornaments, having a more cryptic, streaky brown plumage. Males also exhibit three distinct behavioral morphs: territorial 'independents' (with large ruffs), smaller 'satellites' (with white ruffs), and 'faeders' (females that mimic males in size and behavior, but lack ruffs and are genetically female).

How to identify

1. 1

   Size and Shape

   Medium-sized wader, stocky build, relatively long neck, small head, and an upright posture. Males are noticeably larger than females.

2. 2

   Breeding Male Plumage

   Unmistakable with its large, erectile ruff and ear tufts, which come in an astonishing array of colors and patterns (black, white, rufous, barred, etc.). Back and scapulars also highly variable and ornate.

3. 3

   Non-breeding Plumage

   Grey-brown upperparts with darker streaking, white underparts. Look for the relatively long neck, small head, and often yellowish or greenish-grey legs. Bill is dark, sometimes with a paler base.

4. 4

   Juvenile Plumage

   Distinctive 'scaly' pattern on the back due to dark feather centers and pale fringes. Often a buff or rufous wash on the breast and flanks. Legs typically yellowish-orange.

5. 5

   Leg Color

   Variable but often a key clue: yellowish, orange, or greenish-grey, especially in non-breeding birds and juveniles. This contrasts with the black legs of many other small waders.

6. 6

   Behavior

   Watch for their characteristic foraging style, often probing in mud. During breeding, the lekking behavior of males is unique and highly distinctive.

Habitat & range

Biomes

Tundra, taiga, temperate grasslands, wetlands, coastal areas

Geographic range

Breeds across Arctic and sub-Arctic Eurasia, from Scandinavia east to Siberia. Winters primarily in sub-Saharan Africa, but also in southern Europe, the Middle East, South Asia, Southeast Asia, and Australia. Vagrants occur regularly in North America.

Elevation range

Typically lowlands, especially near water bodies; generally not found at high altitudes.

Preferred environments

Breeding: wet meadows, marshy tundra, bogs, and damp grasslands. Non-breeding/Migration: freshwater and brackish wetlands, flooded fields, sewage farms, estuaries, mudflats, and coastal lagoons.

Behavior

Activity time

Diurnal, though may forage at night during migration or in areas with tidal influence.

Feeding habits

Forages by probing in soft mud or shallow water, picking items from the surface, or gleaning from vegetation. Diet consists mainly of insects (especially larvae of flies and beetles), crustaceans, mollusks, worms, and spiders. During migration and winter, they also consume seeds and other plant material.

Social behavior

Highly social, especially outside the breeding season, forming large flocks, sometimes numbering thousands of individuals. During breeding, males gather at leks (communal display grounds) where they perform elaborate courtship displays to attract females. Females are solitary nesters.

Flight pattern

Strong, direct flight with rapid wingbeats. Often flies in compact flocks during migration. When displaying, males may perform short, fluttering flights.

Migration pattern

Long-distance migrant. Breeds in the Arctic and sub-Arctic of Eurasia and migrates south to wintering grounds in Africa, southern Europe, and Asia. Migration occurs in broad fronts, often with stopovers at suitable wetland habitats.

Territoriality

Males are highly territorial on the lek, defending small display territories. Females are territorial around their nests but not on the lek itself. Non-breeding birds are generally not territorial.

Breeding & reproduction

Breeding season

May to July

Nesting habits

Nests are shallow scrapes on the ground, often concealed in dense vegetation in wet meadows or marshy areas. Lined with grass, leaves, and moss. Females are solely responsible for nest building and incubation.

Clutch size

3-4 eggs

Egg description

Typically 4 eggs, olive-buff to greenish-brown, heavily spotted and blotched with dark brown or black, especially at the broader end. Pyriform (pear-shaped).

Incubation period

20-23 days, incubated solely by the female.

Fledging period

25-28 days after hatching, chicks are precocial and leave the nest shortly after hatching, but are cared for by the female until they can fly.

Parental care

Only the female provides parental care, incubating the eggs and raising the chicks. Males play no role in nesting or chick-rearing.

Where to find

Field tips

1. Scan Wader Flocks. Ruffs often associate with other waders. Carefully scan mixed flocks for their distinctive shape, leg color, or, if in breeding plumage, the elaborate ruff.
2. Look for Upright Posture. Even in non-breeding plumage, Ruffs tend to stand more upright than many other small sandpipers, giving them a distinctive silhouette.
3. Observe Leg Color. The yellowish, orange, or greenish-grey legs are a good field mark, especially when comparing with black-legged species.
4. Visit Lek Sites (Breeding Season). If in breeding range, finding a lek site offers the best chance to observe the spectacular male displays. These are often in open, wet grasslands.
5. Check Flooded Fields. During migration, Ruffs frequently use flooded agricultural fields, which can be excellent places to find them.

Similar species

Quick facts

Common Name:

Ruff

Scientific Name:

Calidris pugnax

Family:

Scolopacidae

Conservation Status:

Least Concern

Breeding Habitat:

Arctic/sub-Arctic wet meadows, tundra

Wintering Habitat:

African wetlands, southern Europe, Asia

Diet:

Invertebrates, some plant material

Key Feature:

Elaborate male breeding plumage (ruff and ear tufts)

Fun facts

• The Ruff is one of the most sexually dimorphic birds, with males being significantly larger and having highly variable, elaborate breeding plumages.
• Male Ruffs exhibit three distinct behavioral morphs: 'independents' (territorial, with large ruffs), 'satellites' (smaller, with white ruffs, share territories with independents), and 'faeders' (genetically female but mimic males in size and behavior, lack ruffs, and are rare).
• The name 'Ruff' refers to the distinctive collar of feathers that males develop during the breeding season.
• Ruffs are famous for their lekking behavior, where males gather at communal display grounds to perform elaborate courtship rituals to attract females.
• Despite their elaborate displays, male Ruffs play no role in nesting or raising the young; all parental care is provided by the female (Reeve).
• Ruffs are strong long-distance migrants, undertaking journeys of thousands of kilometers between their Arctic breeding grounds and African wintering areas.

Scientific classification

Kingdom

Animalia

Phylum

Chordata

Class

Aves

Order

Charadriiformes

Family

Scolopacidae

Genus

Calidris

Species

Calidris pugnax

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