Google the Carolina Parakeet, it was hunted into extinction for it's women's hat feathers. The were easy to shoot because they stayed together and would always come back to the same tree looking for the dead missing member.
Although humanity may have played a large role in the demise of this species, there are many other factors at play. Honey bees took over the parakeets’ nesting sites and the Carolina parakeet’s altruistic behavior of congregating around a hurt member of their flock, which ultimately would present the predator—be it human or animal—with the opportunity to kill many more than just one bird. However, it is hypothesized that, ultimately, poultry disease was the cause of the Carolina parakeet’s final extinction.http://vtwildlifebiology.blogspot.com/p/carolina-parakeet.html
The CP became near extinct during the 19th century, otherwise known as the 1800's.......and what was the population along the east coast during those years and why didn't the bird expand westward since there was plenty of habitat for it to thrive in?
Once again, I offer that there is no substantive evidence that that bird was ever a native of this country but rather an import from South America that managed briefly to thrive on this continent until it finally died off..........not because it was shot off.