Andy Rouse / African Elephant (Loxodonta africana) calf in mud wallow in rain Maasai Mara, Kenya, Africa

Tony Heald / Hanuman langur (Semnopithecus entellus) baby next to mother, Bandhavgarh National Park, India.

Tony Heald / Hanuman langur (Semnopithecus entellus) eating coconut husk, Bandhavgarh National Park, India. March.

David Pattyn / Hanuman langur / Northern Plains Grey Langur (Semnopithecus entellus) drinking from a water tap at Ranthambore fort. Ranthambore National Park, Rajasthan, India.

Andrew Parkinson / Hanuman / Northern Plains Grey Langur (Presbytis entellus) two youngsters chase each other up a sloping tree. Bandhavgarh National Park, India.

Andrew Parkinson / Hanuman / Northern Plains Grey Langur (Presbytis entellus) youngster in mid-air leaping from a sloping tree trunk to a nearby tree sapling. Bandhavgarh National Park, India. Non-ex.

Mary McDonald / Northern Plains grey Langur (Semnopithecus entellus) baby holding onto mother, Bandhavgarh National Park, Madhya Pradesh, India

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) baby playing with a stick by its mother. Kanha National Park, Madhya Pradesh, India.

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) baby playing with a stick by its mother. Kanha National Park, Madhya Pradesh, India.

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) mother with baby in tree. Kanha National Park, Madhya Pradesh, India.

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) in leafless tree top. Kanha National Park, Madhya Pradesh, India.

Yashpal Rathore / Hanuman Langur (Semnopithecus entellus) infant with his mother, Ranthambore National Park, India

Axel Gomille / Hanuman langur (Semnopithecus/ Presbytis entellus), female with baby at water tap, Ranthambhore National Park, Rajasthan, India