There are roughly three billion fewer birds flying about North America today than there were 50 years ago. This amounts to a staggering 29 percent decline in the continent’s diverse bird populations.
This is sobering conclusion of a study entitled Decline of North American Avifauna recently published in the journal Science.
This assessment was reached after a group of scientists studied data regarding populations of 529 species of birds. According to the paper’s lead author, Dr. Ken Rosenberg, a senior scientist with the Cornell laboratory of Ornithology, and the American Bird Conservancy, “This major loss was pervasive across all bird groups.”