I have taken in Seagulls, Magpies, Pigeons and blackbirds over the years. I put them in a large bird cage in the back garden on a table under a tree and kept my eye on them, I added a bowl of water, some bread crumbs and some of those bird seed sticks. When I see another bird of the same breed hanging around the cage, I open the cage and off it goes. The pigeon was attacked by a cat and lost it's tail feathers and I kept that pigeon in the large bird cage in the kitchen until they grew back, it was about 7 weeks and when I let it out off it flew and then came back and sat on my fence. I called it Molly.
We once had two white doves come to live on our loft window ledge, the neighbours were complaining about the mess they were making so we opened the window and they came into the loft. I caught them in a laundry basket and we took them to Blackpool, let them go and when we got back home to West Yorkshire, they were back sitting on the loft window ledge. In the end some friends were going to Devon for a holiday and took them with them and we never saw them again. I still have the photos of the white doves on our window ledge. I am the bird woman of West Yorkshire.