Secrets of the Zoo: Down Under Season 4

In one of the biggest vet procedures ever performed at Taronga Zoo nearly thirty staff and specialists are involved in the risky sedation of their 5.5 metre tall giraffe Jimiyu.

Two gorillas are at the hospital as a pair of lions is getting acquainted.

A king cheetah has slowed down, and 97 turtle hatchlings return to the sea.

A takhi hoof trim takes a scary turn, and a male monkey needs some space.

A mystery lump on Ras the camel's ear has everyone stumped so it's time to investigate; the team find themselves in the middle of a life and death struggle to save an eastern long neck turtle with a fishhook stuck down its neck.

Masego the wild dog needs surgery on a worrying lump on her chest; a little penguin comes in to the hospital after narrowly surviving an eagle attack; a mission to Norfolk Island to save one of the world's most endangered species from extinction.

A wild koala has an unknown illness, and a new sea lion arrives at the zoo.

Taronga's free flight bird experience is a favourite with visitors, but it can take months of training to ensure the birds are happy to take part and don't fly away when they have the option to.

After a 16-month gestation, Kufara, the 13-year-old black rhino, has gone into labour with her second calf.

The mating song between a white-cheeked gibbon pair was a joy to hear, but when Taronga's female gibbon, Nellie, died six months ago, the male, Kayak, went silent.