After the rains start, life starts appearing in puddles. Frogs like this appear, full grown, in our driveway. I must believe that they are "hibernating" in the mud for months, waiting for the wet season, when they dig themselves up. I've seen them scurry and burro into the mud when approached. And suddenly it's not hard to believe that the plague of frogs brought on by Moses in Egypt was not so unnatural. God merely prepares the conditions. Flys also seem to suddenly proliferate in certain conditions. Therefor, the other miracles must also be easy enough to call forth.