siamang

सुमात्राको ठूलो कालो गिबन, जसका खुट्टाका दोस्रो र तेस्रो औँला आंशिक झिल्लीले जोडिएका हुन्छन्

large black gibbon of Sumatra having the 2nd and 3rd toes partially united by a web