Just some additional info - on the off chance that it may be helpful to someone...
I have several different breeds and varieties, and I want to be able to identify individuals - I can tell each of the breeds at a glance (for example, I can tell the Colubian Wyandottes from the White Rocks from the Silver Laced Wyandottes, etc) but it can be difficult to tell the four White Rocks apart as individuals.
I have poor vision, so the numbered bands are pretty useless to me - but I can see color pretty well, so I went with the colored, spiral bands. It went something like this:
Columbian Wyandodttes - Red, White, Green, Yellow
Buff Wyandottes - Red, White, Green
Silver Laced Wyandottes Red, White
Gold Laced Wyandottes Red, White
Buff Orpingtons Purple, Orange
Americaunas - Purple, Orange
White Rocks - Black, Pink, Blue, Lime
Rhode Island Reds One color of each (there were 12 colors to choose from)
Now, I can tell my birds apart as individuals