Hong Kong is one of the planet's most densely packed urban areas. Not far from its concrete jungle is a real jungle with free-roaming wild cows and water buffalos. One woman is trying to save them.

As Hong Kong prepares to welcome the Year of the Snake on Wednesday, Chau Ka-ling displays a moving serpent with practiced ease, holding it like a pet in her decades-old restaurant in the city.

Gary Ades, the head of fauna conservation at Kadoorie Farm and Botanic Garden, on the evolution of animal welfare and conservation in Hong Kong.

Hong Kong is one of the planet's most densely packed urban areas. Not far from its concrete jungle is a real jungle with free-roaming wild cows and water buffalos. One woman is trying to save them.