https://en.wikipedia.org/wiki/Passenger_pigeon https://en.wikipedia.org/wiki/Passenger_pigeon > The pigeon migrated in enormous flocks, constantly searching fo

https://en.wikipedia.org/wiki/Passenger_pigeon https://en.wikipedia.org/wiki/Passenger_pigeon > The pigeon migrated in enormous flocks, constantly searching for food, shelter, and breeding grounds, and was once the most abundant bird in North America, numbering around 3 billion, and possibly up to 5 billion. Past performance is not indicative of future results.