I use coloured plastic 'split' rings for ID purposes, I find them easier to take on and off a bird than the spiral rings. They also come in sizes to fit the tiniest bantam chicks up to the biggest Large fowl breeds. Coloured cable ties can also be used as useful temporary rings for birds. These are are more easily sourced than purpose made plastic leg rings. If you are ringing chicks, a close watch will need to be kept that rings don't become to tight as the birds grow, and larger replacements fitted as and when necessary. I also tend to avoid using red coloured ties or rings, as birds instinctively peck at anything red, so especially with feather legged breeds where new blood feathers develop down the shanks and toes, further encouragement to peck at these areas is best avoided!!. . . .