I've tried, for years. The biggest hurdle, in all honesty, are the people who like to feed them and think they're pretty. These are mainly elderly people who have nothing better to do than go to local meetings and drown out everyone else with their bullshit.

My neighborhood is full of people who never leave their homes, never open their windows, don't do shit to their gardens except fill multiple bird feeders every day to intentionally attract deer and other vermin.