Bristol Zoo was a zoo in the city of Bristol in South West England. The zoo's stated mission was to "maintain and defend" biodiversity through breeding endangered species, conserving threatened species and habitats and promoting a wider understanding of the natural world".

The Asiatic lion is a lion population of the subspecies Panthera leo leo. Since the turn of the 20th century, its range has been restricted to Gir National Park and the surrounding areas in the Indian state of Gujarat. The first scientific description of the Asiatic lion was published in 1826 by the Austrian zoologist Johann N. Meyer, who named it Felis leo persicus. Until the 19th century, it occurred in Saudi Arabia, eastern Turkey, Iran, Mesopotamia, and from east of the Indus River in Pakistan to the Bengal region and the Narmada River in Central India.