Some breeders will name there birds. Jo Mannes has names such as Hurculies and Apollo. Very powerful names. You do not need to use a number to enter the bird. Here you tell the organisers how many birds you have in each division and they will give you a sticker with a code number on them.
The number tells the number of show bird not the ring number. EG my bird could be Class 22 No. 623. Class 22 is Opaline Hen. And the bird is no 623 in the show. The Bird I entered was PR-6 389 but that is not shown anywhere.
Legring numbers are for your own identification and have nothing to do with shows. A bird has to have one to be shown but it isnt used in a show.
The idea being that all show cages are the same and UNMARKED so that noone, especially a judge knows who owns the bird when it is judged.
The idea is anonymous birds so they win on their own merits.