Observational documentary series capturing, in incredible detail, the remarkable behaviour of the animals at Chester Zoo, and their relationships with their keepers
A look back at some of Chester Zoo's expert escapologists
Some of the zoo's animals are happily together forever, including penguins Rudd and Spike
Asian elephant Thi is pregnant with her ninth baby
At the reptile house, the Bermuda skinks have a ferocious approach to mating
Series 9 Episode 3
Chester's hornbills and meerkat Huskie have the baby blues
Series 9 Episode 2
The young male chimps test the pecking order. There's a fish out of water at the aquarium.
Series 9 Episode 1
Youngsters across the zoo are about to have their first Christmas, and there's newbies too
The Secret Life of the Zoo at Christmas
Keepers are keen to breed some baby eastern bongos, an endangered species of antelope
Series 8 Episode 6
Keepers hope there may be a first joey on the way for dusky padamelon Styx
Series 8 Episode 5
A pair of Bactrian camels experience the trauma of separation
Series 8 Episode 4
Asian short-clawed otter pups are developing bald patches. Plus, Caribbean flamingos.
Series 8 Episode 3
Keepers are vigilant of the zoo's Sumatran orangutans
Series 8 Episode 2
Penguins Almond and Walnut go house-hunting, but an intruder is eyeing up their turf
Series 8 Episode 1
An underwater special featuring blind fish, rare amphibians, a frisky penguin and more
Jaguars Napo and Goshi aren't breeding. Will training Napo to be more assertive help?
Series 7 Episode 7
Flamingo mum Calypso loses interest in mothering her chick. Three onagers are pregnant.
Series 7 Episode 6
Bears Lima and Madidi aren't getting on. Two butterflies get drunk on fermented fruit.
Series 7 Episode 5
When dik dik Kahri becomes a dad, his fight or flight instinct goes into overdrive
Series 7 Episode 4
Sloth Tina is putting on weight. Is she pregnant? Or just eating too much?
Series 7 Episode 3
Can adolescent orangutan Tuti prove that she's responsible enough to hold baby Kesuma?
Series 7 Episode 2
A pig goes on the run. And will mono-browed fish Noel Gallagher and Frida Kahlo mate?
Series 7 Episode 1
It's Christmas at Chester Zoo. The UK's first ever surviving sun bear cub is born.
The Secret Life of the Zoo at Christmas 2018
Tortoises Burt and Terrance compete for the affections of breeding female Smooth Sides
Series 6 Episode 7
Red panda Nima's new mate chases her up a tree. Plus baby meerkats, shy penguins and more.
Series 6 Episode 6
Bush dog Mana is pregnant. There's a power struggle on chimp island. Otter Wallace is ill.
Series 6 Episode 5
Young meerkats Beagle and Huskie become parents for the first time
Series 6 Episode 4
Young tapir Solo is moving to a new zoo. Pregnant rhino Asha goes into labour at night.
Series 6 Episode 3
Chimp Zee Zee gives birth to a daughter. Elderly chameleon Mr Parsons has a date.
Series 6 Episode 2
The keepers think that pregnant elephant Thi is three months overdue
Series 6 Episode 1
The keepers struggle to transport a suspicious warthog and a giraffe
Series 5 Episode 6
Spider monkey Kiara seems to want to hang out with friends rather than look after her baby
Series 5 Episode 5
Young orangutan Tripa relies on his mum for everything but now she's having a new baby...
Series 5 Episode 4
Giraffe Orla is due to give birth. Orangutan baby Tombol tests his luck with the gibbons.
Series 5 Episode 3
African painted dog K'mana is pregnant with Chester's first litter of this rare species
Series 5 Episode 2
Chameleons Charles and Eddie try to impress new arrival Ruby. Plus: orangutans, and more.
Series 5 Episode 1
Night-time special. Aardvark Koos gets romantic with his sister. Plus: seahorses and more.
Series 4 Episode 10
Sun bears Toni and Millie have relationship problems. Plus: baby rhinos and otter pups.
Series 4 Episode 9
The tapirs move to a new home. Plus: golden poison frogs, chimps and a baby porcupine.
Series 4 Episode 8
Sloth Tina has been giving her partner Rico a hard time. A chameleon goes speed-dating.
Series 4 Episode 7
The keepers make gifts for the animals. Plus: chimps, dwarf mongooses, rhinos and ants.
The Secret Life of the Zoo at Christmas 2017
Chester's male lemurs' peaceful life is turned upside down by a female arrival
Series 4 Episode 5
The chimps have been brandishing a large stick. Keeper Niall tries to get it back.
Series 4 Episode 4
Marmoset Audrey has to carry her babies everywhere. Plus: bears, elephants and hyraxes.
Series 4 Episode 3
Red panda Jung's losing weight and no one knows why. Plus: mandrills, tigers and penguins.
Series 4 Episode 2
Four rare and mysterious tenrecs arrive at the zoo. Rhino Kitani is due to give birth.
Series 4 Episode 1
Mr Parsons the chameleon meets a new mate, Daphne from Paris
Series 3 Episode 7
Rare okapi Stomp injures K'Tusha with his horn when he tries to mate with her
Series 3 Episode 6
Tapir Jenny, who has two young offspring, is ill. Widowed porcupine Roxy meets a new mate.
Series 3 Episode 5
An elephant calf is born at Chester. Bush dog Franco has got his sister-in-law pregnant.
Series 3 Episode 4
Cheetah mum Kinky Tail is on the operating table. Baby otter Bo goes missing.
Series 3 Episode 3
The penguin chicks face the ordeal of joining the main pool
Series 3 Episode 2
Can mantis Bruce survive mating with deadly Natasha? A rhino couple are reunited.
Series 3 Episode 1
Ten brave keepers have to catch reticulated python Bali for a health check
The Secret Life of the Zoo at Christmas 2016
Chester's dominant female meerkat faces a power struggle with her own daughter
Series 2 Episode 5
Oana the anoa and capybara Lochley both give birth. Two tigers are moving to other zoos.
Series 2 Episode 4
An outbreak of disease in the penguin colony leaves chick Munch fighting for his life
Series 2 Episode 3
Kendari the babirusa is pregnant, but two otters keep throwing stones at her house
Series 2 Episode 2
Lioness Kumari seems to be losing interest in her partner, Iblis
Series 2 Episode 1
There's a surprise orangutan birth. Plus: bats, macaques, jaguars and risky rhino mating.
Series 1 Episode 6
A chimp takes a moorhen hostage. Plus: a fussy French crocodile, turtle love and penguins.
Series 1 Episode 5
Will Chester's female zebras be interested in new stallion Mac?
Series 1 Episode 4
The giraffe family have a new arrival. The aardvarks wreak havoc by night.
Series 1 Episode 3
The tigers move house. A tarantula risks his life to mate. Orphan bears arrive at the zoo.
Series 1 Episode 2
Red panda Nima gives her partner Jung the cold shoulder. Elephant Thi is expecting a baby.
Series 1 Episode 1
Find out more about some of everyone's favourites, including Rud and Spike the penguins
Extra: The Stars of the Zoo
Can they live together in harmonious cohabitation? Watch them in action.
Extra: Meerkats vs Porcupines