I 'adopted' three frogs that have made my two small ponds their home (about 4'x4'). I assumed they left as I haven't seen them for awhile. Well my son walked by the shallow pond tonight and he saw one jump in the water. He caught it and put it in warm tap water because he 'felt sorry for it being so cold'. I told him frogs hibernate and he shouldn't have done that (although it was a nice gesture). Considering the ponds briefly froze once this year, it appears they intend to overwinter here. But I'm not sure my small landscaping ponds are the right environment for an overwintering frog and there's nothing nearby they can go to. I read frogs overwinter in deep water burrowing under leaf litter or other debris. My ponds have a thin layer of stone at the bottom and are only 18" - 24" deep. Could they overwinter on land too? The margins of the pond are flagstone with plenty of crevices (where they like to hang out in warm water). The surrounding ground cover is small river rock which transforms to mulch and soil nearby. Will these frogs manage to find a place to overwinter without dying? My son is very concerned and I promised I'd ask. These are garden variety green/brown Indiana frogs. Thanks.