A BBC Earth documentary crew using drones has captured unprecedented cooperative parenting between two wild tigresses in Nepal's Bardiya National Park.
The behavior challenges the long-held scientific view that tigers are strictly solitary animals.
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The two-part series, Tiger Island, premiered on BBC One on June 7, 2026. It showcases the highest concentration of tigers on Earth in western Nepal.
Filmmakers tracked the big cats with a fleet of drones, remote cameras, and thermal optics. They identified individual tigers by their unique, barcode-like stripe patterns.
Footage shows an adult tigress named Goma resting with her two nine-month-old cubs.
They were then joined by three additional cubs belonging to her neighbor and suspected daughter, Jugini.
Researchers observed the animals forming a collective group while Jugini left to hunt and feed herself.
Wildlife experts believe this cooperative babysitting strategy evolved to protect offspring from predators, including dominant male tigers like Bandheil, who controls the territory.
Bandheil weighs over 200 kilograms and poses an infanticide threat to cubs, despite being their likely father.
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The interaction surprised the production team and wildlife biologists.
"They don't share cubs, they don't share parenting duties," said Dan O'Neill, wildlife biologist and Tiger Island host.
"This is NOT what it says in the textbooks," echoed cinematographer Max Hug Williams.
Biologists compared this flexible behavior to a 2006 case at India's Ranthambore National Park, where a male tiger raised two orphaned cubs alone after their mother died.
"You just don't imagine that there are things to learn still about the most iconic animal on the planet.
But there is," O'Neill said.
The documentary is narrated by British actor Amrita Acharia and features local wildlife guides Sushila, Manju, and Ranju Mahatara.
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The final episode airs on June 14, 2026.
