When the Lion Lies Down With the Foal, Chobe national park, Botswana

In this touching photo, the lion is carefully holding its prey before tearing it apart.

Photograph: Adrian Bailey/Unforgettable Behaviour/NHM

The Stampede, Victoria Island, Canada

A large number of muskoxen stampede through the snow, which is very unusual for these large Arctic animals.

Photograph: Eric Pierre/Unforgettable Behaviour/NHM

Boto Ball Play, Rio Negro, Amazon, Brazil

A male adult dolphin is playing around with a macucu nut, possibly because he wanted to show off in front of the females.

Photograph: Kevin Schafer/Unforgettable Behaviour/NHM

A Little Swinger, India

A small group of grey langurs are playing with each other after a long day of searching for food.

Photograph: Thomas Vijayan/Unforgettable Behaviour/NHM

Mother’s Little Headful, Chambal River, India

An adult female gharial is taking a stroll in the water while her babies are sitting on its head.

Photograph: Udayan Rao Pawar/Unforgettable Behaviour/NHM

Salmon Swipe, Katmai national park, Alaska

A grizzly bear is swimming close to the shore trying to capture salmon.

Photograph: Paul Souders/Unforgettable Behaviour/NHM

The Penguin Protector, Antarctica

An Adelie penguin is trying to protect his young siblings while their parents are gone to find food for them.

Photograph: Linc Gasking/Unforgettable Behaviour/NHM