A range warden found the animal stuck in the concrete ditch at the Rogiet Moor range in Caldicot.Read more
Volunteers say patches of urban wasteland make "ideal" haunts for the creatures.
The RSPB has opened a hide at Haweswater where people can watch not birds, but badgers.
For many years the reserve at Haweswater was the home to England's only nesting golden eagles, and wardens staffed a hide with telescopes that was visited by thousand of people every year.
With the last eagle having disappeared some years ago, the wardens are setting up guided visits to observe a badger set elsewhere in the area, from a hide that means the creatures will not be disturbed.
- Haweswater is not far from the Shap area, where imported cattle infected badgers with TB, meaning some had to be culled last year, but this population is outside the affected zone.