BULLFROGS START CALLING once the poison ivy is about 4 inches tall and the carpenter bees are buzzing around the rafters of the barn. All of that signals the real start to summer, and it happens in early May around here. But the legal frog-hunting season doesn’t open until later in the month. I think that’s for the best because it forces country kids to have to sit and listen to the s for a couple weeks before getting after them. Delayed gratification is a good lesson to learn.