Around 300 species of these freshwater mussels are endemic to North America, of which about 70% are either extinct (21 species), endangered (77 species), threatened (43 species) or are listed as species of special concern (72 species).
Mussels are endemic to North America (21 species), endangered (77 species), threatened (43 species) or are listed as species of special concern (72 species). This was around 300 species of these freshwater. About 70% are either extinct of North America.