acording to the frog internet most frogs spend winter in compost heaps or beneath mud as becouse they can breath through their skin they can do this ,we have some around our compo heaps which we think are now asleep as we havnt seen them for some time, also they dont seem to spend as much time in ponds as we first thought they would pehaps more to the mating season maybe, were also luck enough to have some warty blackish toads who im told help keep the slugs down ,ours must be on diets ,
good luckAlan4711