Yellow-cheeked crested gibbon
Nomascus gabriellae

Adult gibbons

Adult male, Kunming Zoo, China, 20 Nov 2007.
Adult male "Arthur", La Flèche Zoo, France, 29 May 1988. Notice the brown chest and the yellow cheek patches.	Adult male "Arthur", La Flèche Zoo, France, 29 May 1988.	Adult male "Arthur", Clères Zoo, France, 29 June 1993. Same male as in the previous two photographs, running.
Adult male "Charles", Clères Zoo, France, 23 May 1988. The brown chest is well visible in this photograph.
Adult female, Kunming Zoo, China, 20 Nov. 2007.
Adult female, Phnom Tamao Zoo, Cambodia, 13 Sept. 2006.		Adult female, Phnom Tamao Zoo, Cambodia, 13 Sept. 2006. Notice the lateral direction of the fur on the cheeks: The hairs spread out from the corners of the mouth like a fan. Females of this species usually have a less pronounced whitish face ring than this individual, in contrast to N. leucogenys and N. siki.
Adult female "Chloé", Mulhouse Zoo, France, 30 April 2005.		Adult female, Saigon Zoo, Vietnam, 25 Sept. 1993.
Adult female N. gabriellae (left ) and adult female N. leucogenys (right), Dusit Zoo, Bangkok, Thailand, 30 March 1999.		Adult female, Nam Bai Cat Tien Nature Reserve, Vietnam, 27. Sept. 1993.
Adult female "Gabriella", Clères Zoo, France, 28 June 1993.	Adult female "Lili", Hong Kong Zoo, China, 9 Sept. 1990. This female is supposed to be quite old (she arrived at the zoo in February 1968). If she looks a little rough, it is because her hair is all wet from the rain.	Adult female "Toto", Mulhouse Zoo, France, 13 Sept. 1988.

Immature gibbons

Infants for sale by an animal dealer, Saigon, Vietnam, Dec. 1988. Phot. Jörg Adler. These infants exhibit various intermediate stages between the yellow natal coat and the black juvenile coat. The two animals an the left are clearly less than one year old, the animal at the right may be about 1 year old, but these are just estimates.		Juvenile male "Tonkin" (2 years 7 months old), Mulhouse Zoo, France, 30 April 2005.
Subadult female "Eva" (5 years 5 months old), Hong Kong Zoo, China, 9 Sept. 1990. This female has started to change from her black juvenile coat to the yellow adult coat. Light hairs are mixed into the black fur,giving her a dark grey color. Note the whiteish stripes which appear above the eyes.	Subadult female, Beijing Zoo, China, 19 Oct. 1995. Although the exact age of this wild-born female is unknown, she is in about the same intermediate stage of color change as the female shown in the previous photograph.
Subadult female "Gabi", Cuc Phuong Primate Centre, Vietnam, 4 April 1998. The exact age of this wild-born female is unknown. She exhibits an intermediate stage between the black juvenile coat and the yellow adult coat; the transition is more advanced than in the females shown in the previous two photographs.	Subadult female "Gabi", Cuc Phuong Primate Centre, Vietnam, 4 April 1998. Same female as in previous photograph.	Subadult female, Kunming Zoo, China, 20 Nov 2007.
Subadult pair, Leipzig Zoo, Germany, 2 July 1988. The exact age of these wild-born gibbons is unknown. The male is slightly smaller than the female. The female is of adult size and has almost comleted her transition to the adult coat. Only the absence of light hair below the eye reveals that she is subadult or young adult.		Subadult male "Robin" (4 years 5 months old), Mulhouse Zoo, France, 30 April 2005.