Things got hot and heavy during Sunday’s Planet Earth III (Picture: BBC)

Viewers of Sunday night’s Planet Earth III flocked to X, formerly Twitter, to share their shock over a scene featuring some very frisky frogs.

During one segment in the show, narrated by Sir David Attenborough, viewers were introduced to a group of European common frogs as they tried to find mates in the Alps.

One male frog finally made it to the breeding pool, but the cameras didn’t stop rolling.

Taking to social media, viewers shared their thoughts about the X-rated moment, with one person quipping: ‘S******g frogs on the TV on a Sunday.’

Another added: ‘Nothing like some frog porn on a Sunday evening #PlanetEarthIII #PlanetEarth3,’ and someone else wrote, ‘Frogs getting frisky wasn’t on my bingo card today! #PlanetEarth3 #davidattenborough.’

Other comments included: ‘Mating frogs on #PlanetEarth3 – still a better love story than Twilight’ and ‘Gonna be another frog orgy isn’t it. #PlanetEarth3.’

During one segment in the show, narrated by Sir David Attenborough, viewers were introduced to a group of European common frogs (Picture: BBC)

When Planet Earth returned to the BBC last month, 97-year-old Sir David was interviewed alongside other key members of the Bafta and Emmy Award-winning show’s creative team.

During the chat, Sir David suggested that the contribution of his dulcet tones to the show perhaps isn’t that ‘necessary’.

Sir David also revealed that he ‘held his breath’ over the ‘most extraordinary shot’ from this series, which involved a leopard leaping down over 50 feet in the air from a tree to grab an antelope.

Sir David suggested that the contribution of his dulcet tones to the show perhaps isn’t that ‘necessary’ (Picture: BBC NHU/Nick Lyon)

The legendary TV star writes and voices the narration for Planet Earth, working from film sent to him from the production’s travels around the world.

‘I don’t go out there anymore, I’m sitting writing the commentary, so I see the action before I know it’s going to happen,’ he explained.

Sir David admitted that it meant the show often ‘surprised’ him as he didn’t know what was coming.

The legendary TV star writes and voices the narration for Planet Earth, working from film sent to him from the production’s travels around the world (Picture: Getty)

‘I sit in front of the television set with my pen, writing the words – and then suddenly you see this, and you realise you haven’t written anything because you’re just completely held.’

‘And that may tell you that perhaps your words aren’t all that necessary,’ he added, in supremely self-deprecating fashion.

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