I was walking alongside a stream today looking for signs of a bird's presence, (it was a Dipper). Whilst studying the bank I came across these holes and wondered what made/lives in them.
Here are pictures of the stream,
Pictures of holes in the bank,
Lots of holes in the grassy bank close to the stream.
How big are they? do you get kingfishers or sand martins? the holes in the grass could be field vole but I would need to see a closer shot of one of them.