The subterranean secrets of badgers have been revealed by a BBC film crew.
Over two years, tiny cameras placed deep underground recorded the comings and goings of a wild badger family.
While the animals have been well studied outside of their setts, until now, little has been known about their behaviour while underground.
Never-before-seen behaviour was filmed, including the badgers diligently making their beds each evening before leaving the setts for a night of foraging.
The crew also captured newborn cubs on camera, as well as grooming and fighting between the older animals.
The footage was recorded for a BBC Natural World wildlife programme.
About 300,000 badgers live across Britain, their tracks and trails criss-cross the countryside, yet they are rarely seen.
Andrew Cooper, producer of Badgers - Secrets of the Sett, said: "Before we began filming, I knew that there was a gap in our knowledge about badgers.
"When I spoke to one badger expert, I said to him: 'How much do we know about their life underground?', and he simply held up a blank piece of paper.
"This is the first time we have had the opportunity to see real detail down there."