September 19, 2019 – North America’s birds are disappearing from the skies at a rate that’s shocking even to ornithologists. Since the 1970s, the continent has lost 3 billion birds, nearly 30% of the total, and even common birds such as sparrows and blackbirds are in decline, U.S. and Canadian researchers report this week online in Science. “It’s … Continue reading SCIENCE: Three billion North American birds have vanished since 1970, surveys show