‘Secrets of the Penguins’ Premieres on Eve of Earth Day

By Reuters

Emperor penguin chicks take their first swim in Atka Bay, Antarctica, in this undated handout image obtained by Reuters on April 17, 2025. National Geographic/Bertie Gregory/Handout via REUTERS
Emperor penguin chicks take their first swim in Atka Bay, Antarctica, in this undated handout image obtained by Reuters on April 17, 2025. National Geographic/Bertie Gregory/Handout via REUTERS
Years of filming, often in extreme conditions, has provided new insights into the extraordinary challenges endured by penguins for a documentary series to be premiered on Monday, the eve of Earth Day.

“Secrets of the Penguins” is voiced by U.S. actor Blake Lively and hosted by National Geographic explorer Bertie Gregory, who hopes to engage the widest possible audience with the natural world.

Emperor penguin chicks are covered in snow and ice during a blizzard, on the Ekstrom Ice Shelf, Antarctica, in this undated handout image obtained by Reuters on April 17, 2025. National Geographic/Bertie Gregory/Handout via REUTERS

He says filming that included 274 days on the Ekström Ice Shelf in Antarctica, home to around 20,000 emperor penguins, as well as in locations from Cape Town in South Africa to the Galapagos Islands, led to discovering “new penguin secrets”.

“I have filmed penguins a lot before,” he said. “I thought I knew penguins. I was so wrong.”

Emperor penguin adult parents stand with their chick, on the Ekstrom Ice Shelf, Antarctica, in this undated handout image obtained by Reuters on April 17, 2025. National Geographic/Bertie Gregory/Handout via REUTERS

The three-part series, to be screened on Disney+ on Monday, and on Nat Geo Wild from Tuesday, in all took more than two years to film.

The highlights include penguin chicks jumping off a 50-foot (15 m) ice cliff in order to dive into the sea for the first time in their young lives.

An adult Emperor penguin throws its head back whilst calling out across the colony, on the Ekstrom Ice Shelf, Antarctica, in this undated handout image obtained by Reuters on April 17, 2025. National Geographic/Bertie Gregory/Handout via REUTERS

“As soon as the first one went … they all started to jump. It was an amazing moment to witness,” Gregory said, adding the exploit has never been broadcast before.

“They’re the only animal in the world to raise their young during the Antarctic winter. It is the coldest, darkest, windiest place on Earth,” he said further.

An Emperor penguin chick begs its parent to be fed during a blizzard, in the midst of a colony, on the Ekstrom Ice Shelf, Antarctica, in this undated handout image obtained by Reuters on April 17, 2025. National Geographic/Bertie Gregory/Handout via REUTERS

Gregory says the significance goes beyond any one species.

“We should want to look after penguins, not just because it makes us feel warm and fuzzy inside, but because we need healthy, wild places for so many things,” he said.

A group of adult Emperor penguins travel along the sea ice on their bellies after exiting the water against, as the ice shelf is seen in the distance, on the Ekstrom Ice Shelf, Antarctica, in this undated handout image obtained by Reuters on April 17, 2025. National Geographic/Bertie Gregory/Handout via REUTERS

The 31-year-old explorer has two Daytime Emmy Awards for the series “Animals Up Close with Bertie Gregory” and a BAFTA Television Craft Award for shooting British naturalist David Attenborough’s “Seven Worlds, One Planet”.

An Emperor penguin is seen during a snowstorm, on the Ekstrom Ice Shelf, Antarctica, in this undated handout image obtained by Reuters on April 17, 2025. National Geographic/Bertie Gregory/Handout via REUTERS

He does not see himself taking on the mantle of the 98-year-old Attenborough, who is still at work. “He’s one of a kind,” Gregory said. “There is no replacement.”

A view shows an Emperor penguin colony in Atka Bay, Antarctica, in this undated handout image obtained by Reuters on April 17, 2025. National Geographic/Bertie Gregory/Handout via REUTERS

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