Cyril Ruoso / Siamang (Hylobates syndactylus) hanging from tree, native to southeast Asia

Cyril Ruoso / Siamang (Hylobates syndactylus) hanging from tree while feeding on leaves, native to southeast Asia

ZSSD / Siamang (Hylobates syndactylus) is an arboreal, black furred gibbon native to the forests of Malaysia, Thailand, and Sumatra

ZSSD / Siamang (Hylobates syndactylus) portrait, native to Malaysia and Sumatra