Bertie Gregory

Bertie arrives in the Serengeti as the spectacular wildebeest migration kicks off. He’s here to film the fastest land animal on Earth: the cheetah. As he gets close to a mother caring ...

Over two extraordinary years, National Geographic Explorer Bertie Gregory discovered never-before-filmed secret traditions, surprising intelligence and close-knit societies of penguins. ...

With the expertise of entomologist and fellow National Geographic Explorer Dr. Samuel Ramsey, the series uses groundbreaking filming technology to reveal the extraordinary world of ...