Scanning the surface of the water, her amber eyes alight upon a threat to her pride - a deadly crocodile lurking in the river that the family of lions must cross.
The fiercely protective lioness did not hesitate, leaping into the water and grappling with the reptile to allow the rest of the pride to cross the river in safety.
These images show the magnificent big cat fastening her front legs around the crocodile's jaws and dunking it underneath the water before making a break for the river bank at the Okavanga Delta in Botswana.
