Until last year here in Ca, Fish and Wildlife had NO jurisdiction when it came to feral pigeons. This meant that there was no season on them. The only regulation they had was you could not shoot pigeons on public property, to protect the pigeons people had banded and possibly paid lots of money for. However, in a pesting situation, on private property, they were fair game. All that was required was they were doing damage to the property. Fish and Wildlife considers taking a dump on your roof as damaging property. No need to feel bad about shooting a banded pigeon unless it is illegal in your area.