Is it possible to determine the species that created/is living in this den? The entrances had from about 30cm to 40cm in diameter. There were at least four of them in this particular place. 15m further down a trail there was another, smaller den with just one visible entrance. I wasn't able to take any pictures of the other den as it was too dark.
I found both dens at the egdes of a wooded area (not big enough to be a woodland) next to a field in Kraków.
I found both dens at the egdes of a wooded area (not big enough to be a woodland) next to a field in Kraków.