Secrets of the Zoo: Down Under

The red kangaroo alpha male Malu has trouble eating and gets help from the mobile hospital team; the expected shipment of baby animals arrives.

Koalas, lions, siamangs and others compete for the most boisterous bellow.

Sydney's Taronga Zoo welcomes royalty back, two lions are ready to occupy the recently completed enclosure; a growing number of injured green sea turtles need veterinary attention; pygmy marmosets show off their big personalities.

Nala, the Australian sea lion, gives birth to a healthy pup; the zoo prepares to welcome zebras to the African Savanna exhibit.

Vet Kimberly is concerned that melanoma has returned to an elderly lemur; an injured loggerhead turtle has been rushed to Taronga Zoo.

The keepers have a problem when the female Sumatran tiger, Kartika, behaves aggressively towards her cubs; a malnourished seal needs the help of veterinarian Larry.

Injured koala Malakai enters the zoo's breeding program; a baby crocodile enjoys some treats; a lesser-known Australian marsupial gets a second chance.

Two squirrel monkeys arrive in Taronga with a clear goal, to mate with as many females as possible; it all ends with a broken jaw and a visit to the hospital; Keeper Jordan talks about his special bond with a cheetah.

Zoo staff embark on an ambitious, year-long undertaking in an effort to help Naomi the chimpanzee overcome a complicated medical condition in the hope of finally becoming a mother.

Taronga Zoo's new African Savannah Precinct welcomes its residents.

Koalas, lions, siamangs and others compete for the most boisterous bellow.

Vet Kimberly is concerned that melanoma has returned to an elderly lemur; an injured loggerhead turtle has been rushed to Taronga Zoo.

Sydney's Taronga Zoo welcomes royalty back, two lions are ready to occupy the recently completed enclosure; a growing number of injured green sea turtles need veterinary attention; pygmy marmosets show off their big personalities.

Nala, the Australian sea lion, gives birth to a healthy pup; the zoo prepares to welcome zebras to the African Savanna exhibit.

The red kangaroo alpha male Malu has trouble eating and gets help from the mobile hospital team; the expected shipment of baby animals arrives.

The keepers have a problem when the female Sumatran tiger, Kartika, behaves aggressively towards her cubs; a malnourished seal needs the help of veterinarian Larry.