is this some kind of bird band

[fmerg]

one filed i have been hunting has turned up about 15 of these each has a different number on it
i think its made from zinc
the measure about 3/4 of an inch round

 

[Woodland Detectors]

Hey NY!
Looks like your getting out.
Yes, a bird band.Whether imported or domestic, open or closed banded, the leg band carries letters and numbers which identify the bird. Import bands are traceable - please refer to the information below. Domestic bands purchased from bird associations and some commercial vendors are also traceable.

Open-banded / Imported Birds:

USDA-owned and operated quarantine stations use bands with letters and three or four numbers.

There were 85 quarantine stations, located in the following states:

California - 40 - First letter C or O

Hawaii - 2 - First letter H

Florida - 20 - First letter F

Illinois - 7 - First letter I

Louisiana - 6 - First letter L

Michigan - 2 - First letter M

New York - 6 - First letter N

Texas - 2 - First letter T

A quarantine band always had 3 letters and 3 numbers For example FAB 123

The first letter stands for the state, Florida, California, New York, Illinois, Hawaii, Louisiana and O's were also used in California because they had more than 24 stations.

The second letter stands for the specific quarantine station.

The third letter is part of the number code so with 24 letters and 3 digits you have 24,000 possible combinations. The bands were manufactured and issued to the quarantine station owners. Numbers used in each quarantine lot were reported to USDA. If a station imported thousands of birds each year the sequence would be repeated frequently - for example-maybe conures or other small birds imported in large numbers. If for larger birds the sequence would not be repeated so often. (Author Unknown )