Fewer than half of the wetlands that once existed in the Great Lakes remain, leaving some of the 350 species of birds that rely on the region in search of a home. Along with habitat loss, birds, like other wildlife, must also contend with the fallout from human-caused climate change, lingering pollution and harmful invasive species. In North America alone, there are 29% fewer birds than there were 50 years ago, a 2019 study found.
