Etching Worn Bands
Most bands are made of an aluminum alloy and have unique numbers engraved. These numbers can wear off with time to the point that one number, a few numbers, or the whole band becomes illegible. The time for a bird band to wear off depends on the amount of time that bird species spends in the water and its habits. For instance, a band on a Mallard may wear off one number in 6 to 8 years, while a...