This handout photo provided by the US Fish and Wildlife Service (USFWS) shows common murres clustered together on a cliff ledge at the Alaska Maritime National Wildlife Refuge on July 30, 2019. The common murre, a large black-and-white seabird native to northern waters, has become significantly less common over the past decade due to the impacts of climate change. A new study published on December 12, 2024, in Science reveals that the massive northeast Pacific marine heat wave of 20142016 triggered a catastrophic population collapse, wiping out four million birds -- roughly half the species. (Photo by BRIE DRUMMOND / US FISH & WILDLIFE SERVICE / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / BRIE DRUMMOND/USFWS" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS (Photo by BRIE DRUMMOND/US FISH & WILDLIFE SERVICE/AFP via Getty Images)