Stuart Pimm, a leading conservation biologist, is turning out to be a blogger to follow. He’s down in the Delaware Bay right now, studying some of the birds that are migrating unbelievable distances (see my story in today’s Timessee my story in today’s Times). Unfortunately, the birds are having a rough time because we’re taking away the food they need to power their long-haul flights: horseshoe crab eggs. Check it out.