Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Red Colobus monkeys. One of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey, one of Africa's rarest primates

Zanzibar Red Colobus monkey with young, one of Africa's rarest primates

Gray langurs or Hanuman langurs (Semnopithecus entellus) are the most widespread langurs of the Indian Subcontinent. They are found throughout most of India and Sri Lanka, where this image was taken, and are also established in parts of Pakistan, Nepal, B