Data show that since 1970, the US and Canada have lost nearly 3 billion birds, a massive reduction in abundance involving hundreds of species, from beloved backyard songbirds to long-distance migrants.
Source: US and Canada have lost more than 1 in 4 birds in the past 50 years — ScienceDaily
Data show that since 1970, the US and Canada have lost nearly 3 billion birds, a massive reduction in abundance involving hundreds of species, from beloved backyard songbirds to long-distance migrants.
Source: US and Canada have lost more than 1 in 4 birds in the past 50 years — ScienceDaily
