ten days ago I dug a small pond on my lotty, a friend had offered me some tadpoles from hers so | needed to get it dug pronto. Today I was watching the pond and the taddies swimming when lo and behold a frog surface and then dove again - I was not expecting it. But my pond has obviouly been squatted by a large frog and the tadpoles are still swimming and hiding around the rocks.