What specific terrain feature do Kingfishers often prefer for excavating their nests?

Answer

Vertical or steeply sloped earthen banks

They seek out slight elevation changes, such as natural bluffs or road cuts intersecting streams, to excavate their tunnels safely.

What specific terrain feature do Kingfishers often prefer for excavating their nests?
Geographyhabitatbirdwildlifekingfisher