More Than Lost Feathers

If you were alive in 1970, more than one in four birds in the U.S. and Canada has disappeared within your lifetime. According to research published in *Science*, wild bird populations in the continental U.S. and Canada have declined by almost 30% since 1970.

Bird numbers naturally fluctuate, which explains changes from month to month, but many bird populations have been declining gradually and consistently for years. In a comprehensive 2019 study led by the Cornell Lab of Ornithology, researchers examined 529 bird species in the U.S. and Canada, finding a net loss of 2.9 billion breeding birds...