Serena Davies on her nine-month odyssey to film penguins like never before.

Penguins have ruled my life for two and a half years, and I still love them.

Natural-history filmmakers have long covered penguins, with National Geographic’s Oscar-winning March of the Penguins setting a high bar. Our production team was challenged to capture ambitious, never-before-seen behaviors and craft a compelling, original story.

The key lay in the details. We pored over research papers and worked with our scientific consultants to uncover the unexpected. One 30-year-old paper mentioned a hidden colony of African penguins on Namibia’s Skeleton coast. Another hinted that Galápagos penguins sometimes hunt together. These were the kinds of clues we were looking for.

For each of the three episodes of National Geographic’s Secrets of the Penguins, we created a wishlist of behaviours we hoped to capture with backups – then backups of the backups. Making the list a reality was another challenge entirely.

Penguins live in some of the most hostile and remote places on Earth. Most species live on the wild, uninhabited islands that dot the Southern Ocean, film-accessible only from live-aboard boats. Just reaching these locations required our crews to spend weeks at sea.

By far the most challenging species to film were the emperor penguins, which only live in Antarctica. Every year, as the sea around Antarctica freezes over, these emperors raise their chicks on a vast but temporary ice platform.

Early on, we set our sights on capturing the critical moment when emperor chicks take their first swim, which happens just as the sea ice begins to melt. It’s hard to imagine a less suitable platform to film. A wrong move could send the crew falling down a crack into the freezing water or – even more terrifying – leave them stuck on a large ice floe floating in the Southern Ocean.

Luckily, polar veteran Scott Webster and producer Heather Cruickshank devised a “Catastrophic Breakout Protocol” for such an occurrence, which represented just one part of our 100-page risk assessment.

Filming the full lifecycle of the adults was an even greater mission: we needed a team to ‘overwinter’ in Antarctica.

Field producer Alex Ponniah, director of photography Pete McCowen and cinematographer Helen Hobin joined a team of nine scientists at the German Research Station Neumayer III. They spent more than eight months living and working together in isolation with no way in or out.

Enduring both physical and psychological feats, we set up a Starlink and created a bespoke data-crunching system to send the rushes back to London for editing.

While the logistics were challenging, we soon realised another issue developing: Penguins, apart from when they’re at sea, don’t do that much.

Days and weeks could pass with what we dubbed “penguin mush” – endless shots of penguins just being penguins. But in natural-history filmmaking, things can turn around in an instant.

Seven weeks into our chick-fledging shoot, we had strong material but not quite the world-first behaviours. Extending the shoot was a gamble, both financially and logistically. The sea ice was becoming increasingly unstable, and keeping a team of 13 in a remote field camp was costly.

Days before they were due to leave, crew members, including National Geographic Explorer and wildlife cinematographer Bertie Gregory, spotted something incredible, topping our behavior wish list.

Hundreds of emperor chicks were spotted on the edge of a cliff. Nobody was certain what would happen next. When they jumped – and survived – we knew we had captured never-before-filmed and rarely witnessed behavior.

National Geographic released the clip a year prior to broadcast, and it now has more than 165 million social-media hits – becoming its most-viewed TikTok clip in history.

With 11 shoots in nine locations, we had amazing behaviours, but the heavy lifting would come in the edit. National Geographic’s ‘Secrets of’ format relies on character-driven moments throughout the films to provide unique insights into the species.

Lead editor Stephen Moore meticulously trawled through hundreds hours of footage spotting, collating and building the tiniest moments: a stumble, a squabble, and the wink of an eye from which he could weave a story.

We worked really closely with Janet Han Vissering and Pamela Caragol at Nat Geo on the creation of the series and ultimately what the final episodes would look like. They’re always great partners and their vision and feedback help elevate natural history storytelling in a bold, fresh way.

And Stephen and I spent almost 14 months in the offline looking at penguins all day, every day, and the miraculous thing is… I still love our penguin overlords!