I took a pic of this nuthatch today on my Shepherds Hook and saw what looks like a plastic white band on its leg. You can't see it as well in the pic...but on my camera it definitely looks like plastic not string. Do they ever band birds this way...just by color?
That is way too small of a band to be a plastic leg band put on by a bander. Also, for small birds, there are usually more than one colored band (and a metal numbered Federal band) to ID individual birds because the bands are to small to put numbers on to be seen from a distance (unlike larger birds like geese, hawks, swans, etc.). Looks like something just stuck to its leg.
As an example, when we color-band our woodpeckers, we put two colored plastic bands on one leg and another colored plastic band and the federal band on the other leg. That allows us to ID individuals from a distance with binoculars without having to recapture them.
Here is what color-bands look like on the leg of one of our woodpeckers. Just for reference so you can see the size of the bands in relation to the leg.
birding_nut
birding_nut
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