great advice by wildweeds.
I trapped them in the past. Its easy to get permission from businesses that are affected by them - silos, roof tops, etc.
The trick is to get them used to the trap and thinking its safe. To do this set the trap for multiple days without enabling it. Then on the day that you want to trap them its easy. Simply enable the trap and watch it. When 2-3 birds are caught go and collect them and continue to watch the trap. Its best to monitor it in case of ravens, crows or other predators. Also if there are a bunch of disturbed birds in there the others wont go in.
Its just like how the state bands pigeons.
Also - the trap needs to be in an open area. They wont go into shadows, etc.
A fishing net works but is really slow and hard.