Can anyone shed light onto what the numbers/letters mean on a birds leg ring ?

Billy has a closed silver metal ring and the numbers 00333 01 156 ( i think) he was wiggling all over
there was also some little pattern, or atleast it looked like a pattern ? Might have just been where the pliers had been held to close the ring.

I guess all bird breeders use different numbers/codes for different things... but would be nice to know what things could mean atleast

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I will have to take a better look when I put him away in a minute.
The vertical number was 01... if thats the year, does that mean his 10 years old

I always wondered how they got the rings on, I just assumed they were shut together with pliers D`oh

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Thanx hawksport.
It`s quite interesting to know about these bird rings.

I tried to look again, but my son wasn`t enjoying being pecked to death and I was abit concerned about pulling his leg out, as he was trying his best to tuck it iinto his feathers, bless.

Couldn`t see a N, but there was a PS.

I`m quite intrigued about his little ring now

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