This might be obvious to others, but when i took out some round fence posts recently, i didnt fill the holes in. If it was a hazard, it would just be for me, i thought.
I was surprised to find i had trapped a load of frogs, who were looking bored and hungry at the bottom of the holes.
My haul was 4 frogs and a lizard. I apologised and put them to work in a sluggy area.
Just a note in case anyone else does the same, fill the holes up immediately!