Vancouver Sun: Spotting a common nighthawk in Fort Nelson three decades ago was grounds for “a cerebral orgasm,” remarks Wayne Campbell, retired curator of birds for the Royal B.C. Museum. Today the species is as common as its name. “They’re nesting there now,” he said. “It’s unbelievable, crazy.” The nighthawk is not alone. Birds of all descriptions are winging their way northward as never before on record, spurred on by the dubious forces of global warming and climate change. For …