BrooklynParrots.com, a website devoted to "Facts, lore, audio files, books, photos, and other information about Brooklyn's flocks of wild monk parrots," just posted this really cute photo comic depicting a fight between a pigeon and a pair of monk parakeets (Myiopsitta monachus). I would have thought New York pigeons were tougher than that! Also from BrooklynParrots: a map of monk parakeet distribution in Brooklyn (NY) using the Google Maps API. Some really great population data and anecdotal information on this site, be sure to check it out.
Bonus points to anyone who gets the title ref!