Rick, with the thinner foil I fold over the corner where I puncture a hole for the string and knot the string snugly around the puncture so that there's no play for the wind to take advantage of. I haven't lost any tags due to foil tearing. Sometimes I get sloppy tying around the pedicel and there's enough slack for the wind to lift it off over the capsule. Then there's the sparrows!
...I used to just bury the foil tag down the side of the pot or styrofoam box , with the string attached and visible so I could easily find the tag when I needed... convenient for me; convenient for young avian families looking to build a home. Frayed jute string looks like just the thing! And only metres from the old window awning; so close to home!
I just started using glassine envelopes for pollen this year - very impressed.
