Following on to this - I've been musing a little whilst driving so maybe someone can explain the following to me. I've not googled it , I find the insights from here more useful.
Moles - They are I assume , born underground , hunt underground , jiggy-jiggy underground and I'm guessing die underground.
SO.....
1 ) What is the reason for Mole Hills??? Do they resurface every now and then like a Nuclear Sub for clean air ? or to create gaseous exchange for still air? Or maybe they just get lost and need to come up and check their bearings???
2 ) How large an area of tunnels does a Mole create ?? Wondering this because see point 3 )
3 ) I appreciate Moles are clever creatures when it comes to creating tunnels but if I dig a hole in compressed soil I tend to have probably 8 times the loose soil that came from the void I've just created.
Even if I take into account them somehow compressing the soil tunnel walls further that must leave extra soil to be discarded at some point. Badgers create large outside mounds of the stuff , literally terraforming banks of soil - so what do Moles do ???
Questions-Questions-Questions....