Warmer waters have severely impact North Atlantic puffin populations, resulting in some dead birds washing up in Bermuda.At least six dead puffins — and one alive — have been seen in Bermuda’s waters this year.Researchers have said that puffins are finding less food because climate change is affecting where the fish are.Marie Martin, a researcher at the National Oceanic and Atmospheric Administration Fishery Sciences Center in Woods Hole, Massachusetts, told the Maine Public Broadcasting Network that Puffins usually feed herring to their fledglings.However, more recently, the birds are catching more butterfish, which are typically found further south and too large for fledglings to swallow.Puffin researcher Rebecca Holberton said more than 2,000 Atlantic puffins have washed ashore in North America this winter, and many of the surviving puffins appear thin and in poor breeding condition.Atlantic puffins spend most of their lives at sea, returning to land to breed. The closest breeding colonies to the Island are in Maine and Nova Scotia.