First bird species found only in continental North America to become extinct in its specific wave

- Hunting / Harvesting: not hunted for meat, but eggs and feathers were over-harvested

- Habits: specialized diet due to their beaks

: decline in mussels available in their winter area due to a growth in industry

: limited range and niche

: couldn't flee their niche when human interference changed the environment/area due to their exceptionally limited range and specialized ecological niche

- Rare in the first place

Their Extinction