Yesterday we put the leg bands with my phone number on Linnaeus and Ki-ok! I also have bands with my house number/street name/zip code (fortunately I have a short street name) on them for their other legs, but we wanted to wait until they were entirely used to the first bands before putting the others on. These bands are small, so you can only fit the phone number if you omit the hyphens. I think the second band with the address would help people understand that the first one carries a phone number, and it would immediately tell them where to find me.
The personalised bands are from the awesome BirdBands.com. It takes a while for them to be prepared and shipped to the U.S. from Australia, but it's worth it. These are 6mm, which is the cockatiel size, and stainless steel, to ensure that the birds cannot chomp down on them and close them any more tightly around their legs. Swipe to see the bands and the ringing pliers used to put them on.
I was afraid there would be screaming and resentment, but they did phenomenally well. They must really trust us and know that we wouldn't hurt them, even if we are doing something annoying. We took them to a dark room, gently swaddled them in a shirt using the typical "bird restraint" position, turned the lights on, and one person held the bird and the leg steady while the other used the pliers to close the band around the leg.
Do I *really* want the birds to have to wear these things? No, not really, in a perfect world, but I think their potential benefits far outweigh their potential risks, as long as the size and material are appropriate for the bird. I hope, of course, that my birds will not go missing, but if they ever did, I would feel much better knowing that they carry my contact information wherever they go. There are no actual GPS devices lightweight enough for birds this small yet--at least, not ones any average person could afford--so these are the next best thing.
Oh, and while I'm rambling about this...I also ordered budgie ones for Spectre. :P
Update: They have both bands on now!