Reuters: With their red heads, 7-foot (2.13 m) wingspan and a trilling call, migrating Sandhill Cranes provide a dramatic sunset spectacle as they land by the thousands in wetlands near Sacramento each night during the fall and winter. But the state's ongoing drought has left the cranes, along with millions of other waterfowl that migrate from Canada and other northern climes to spend the winter in California, with fewer places to land, threatening their health as they crowd in on one another to seek shelter...