You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
Yeah. Pretty bird.
So, what if this guy survived in abundance AT LEAST up until humans arrive in North America? You can also have their primary prey survive as well, in order to support their population, or at least give them an equally viable substitute.
How would this effect human migration throughout the continent?