Guardian: Half of North Americas bird species, from common backyard visitors like the Baltimore oriole and the rufous hummingbird to wilderness dwellers like the common loon and bald eagle, are under threat from climate change and many could go extinct, an exhaustive new study has found.
Seven years of research found climate change the biggest threat to North Americas bird species.
Some 314 species face dramatic declines in population, if present trends continue, with warming temperatures pushing the...