The Secret Life of the Zoo

Two of Chester Zoo's zebras are about to give birth. Meanwhile, lioness Kumari seems to be losing interest in her partner, Iblis. And two of warthog Magnum's children are becoming hard to control.

Kendari the babirusa is pregnant, but otters Wallace and Annie keep throwing stones at her house. Next door, orangutan Willie is struggling to impress females Sarikei and Leia.

Penguin chick Munch fights for his life when there's disease in the colony. When young male tortoise Football muscles in on 71-year-old Bert's harem, the keepers bring in two Swedish female tortoises.

Oana the anoa and capybara Lochley both give birth. Tiger mum Kirana's sons are being moved to other zoos to start their own families. Young monkey Rocky won't pay attention to his mum's life lessons.

Four of Chester's orangutans go missing. The dominant female meerkat faces a power struggle with her own daughter. Can bull elephant Aung Bo help provide a baby to keep lone youngster Nandita company?

Can mantis Bruce survive mating with deadly Natasha? Rhino couple Beni and Asha are reunited after four years apart. Giant anteater Pedro falls ill. Bald ibis chick Britney is critically underweight.

Young giraffe mum Tula gives birth, while this year's brood of penguin chicks face the ordeal of joining the main pool, where they must compete for fish with the adult penguins

The arrival of a new female chimp causes upheaval at the zoo, baby otter Bo goes missing, cheetah mum Kinky Tail is on the operating table, and the meerkats steal the porcupines' food

Young elephant Nandita isn't happy when her half-sister is born. Bush dog Franco has got his sister-in-law pregnant. Rhino beetle Sheldon has a damaged wing case; can he impress female beetle Alice?

Tapir Jenny, who has two young offspring, falls ill. Can rhino Kifaru, who has arthritic knees, mate with younger, taller and heavier female rhino Malindi? Widowed porcupine Roxy meets a new mate.

Red panda Jung is losing weight and no one knows why. Mandrill Ludo gets over-friendly with his dad's girlfriend when his dad's at the vet's. Plus: tigers, and penguins.

Power struggle among the African mandrills: Ludo and Jareth want to challenge their father for leadership of the pack. In the Sumatran tigers, mother and daughter argue.

Keepers are thrilled when Spectacled Bear, Lima, gives birth to the zoo's first ever cub, but it's not long before little Mandidi is getting into trouble. The Pygmy Marmosets have twins and the Rock Hyraxes have three pups.

Onager, Holmes, is introduced to the females for breeding. Chimpanzee, Boris, finds a new toy, but keeper, Niall, needs to get it back. Galapagos Tortoise, Charlie, is losing weight because her sister, Zuzu, is dominating her.

The bachelor Ring Tailed Lemurs are joined by two Belted Ruffed Lemurs. Two Javan Green Magpies are paired up in the hope of producing chicks. The Komodo Dragons are harness-trained.