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Douc Langurs (Pygathrix spp.) Fact Sheet: Physical Characteristics

Douc Langurs (Pygathrix spp.)

Physical Characteristics

Body measurements

Attribute Red-shanked Gray-shanked Black-shanked
Head-body length Males: 55-63 cm (22-25 in)
Females: 49-57 cm (19-22 in)
Males: 55-66 cm (22-26 in)
Females: 51-58 cm (20-23 in)
Males: 55-65 cm (22-26 in)
Females: 54-60 cm (21-24 in)
Tail length Males: 52-66 cm (20-26 in)
Females: 42-59 cm (17-23 in)
Males: 56-65 cm (22-26 in)
Females: 54-62 cm (21-24 in)
Males: 69-85 cm (27-33 in)
Females: 65-80 cm (26-31 in)
Weight Males: 8-11.6 kg (18-25.6 lb)
Females: 6-8 kg (13-18 lb)
Males: 8-12.5 kg (18-27.6 lb)
Females: 4.7-11.7 kg (10.4-25.8 lb)
Males: 8-11 kg (18-24.3 lb)
Females: 6-8.2 kg (13-18.1 lb)

 

Data source: Groves et al. (2013)

General Appearance

  • Pygathrix nemaeus (Red-shanked douc) (northern Vietnam and Laos)
    • Face pale yellow-orange with white muzzle (darkens with sun exposure). White whiskers are very long
    • Even-length coat. No cape.
    • Sharply defined multi-colored coat.
    • Gray back and underparts. Upper part of legs is black as well as hands, feet, brow and shoulders
    • White tail, throat, sides of face, forearms and genital region
    • Prominent white rump patch. Males (unlike females) have circular white spot on either side and superior to the corners of the rump patch
    • Knee and below is rust-colored
    • Penis is red, scrotum white
    • Infants gray with black face and two pale stripes beneath eyes. Red tail patch.
    • Tail ends in a thick tassel
  • Pygathrix nigripes (Black-shanked douc) (southern Vietnam and Cambodia)
    • Like the red-shanked but face is blue-gray with yellow-orange eye rings. Black wedge of color between ear and cheek. Shorter whiskers
    • Black area on forehead continues behind ears and onto shoulders
    • Hind limbs entirely black
    • Fore limbs and body gray, belly is paler gray. Hands are black
    • Scrotum and inside of thighs are blue
    • Penis is pink
    • White rump patch surrounds tail. Males (unlike females) have circular white spot on either side and superior to the corners of the rump patch. Tail ends in a thin tassel
  • Pygathrix cinereus (Grey-shanked douc) (south eastern part of Central Highlands)
    • Face coloration like red-shanked douc. Whiskers intermediate between P. nemaeus and P. nigripes
    • Lighter than the two other subspecies
    • Black band on forehead is narrower than other subspecies and not connected to the black shoulders
    • White throat has a thick band of orange.
    • Belly is light grey (lighter than P. nemaeus nigripes)
    • Scrotum is white, penis pink
    • Patch above root of tail and tail itself is white
    • White rump patch surrounds tail. Males (unlike females) have circular white spot on either side and superior to the corners of the rump patch. Tail ends in a thin tassel

Other Physical and Physiological Characteristics

  • Modification of the growth pattern of nose cartilage to form a nasal flap
  • Eyes almond-shaped and set at an angle. Color is dark brown, ringed in black.
  • Known hybrids between P. n. nemaeus and P. n. nigripes have different coloration

Facial Traits

Red-shanked douc langur

The red-shanked douc langur has a pale yellow-orange face and long white whiskers.

Image credit: © San Diego Zoo Wildlife Alliance. All rights reserved.

Page Citations

Ankel-Simons (2000)
Lippold (1998)
Napier & Napier (1967)
Nowak (1999)

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