I shot this drake woodie on 12/28/16 in SE Idaho. It had this blue second leg band with a GPS looking module attached. I called the number on the blue band and found it was the personal cell number of the Nevada waterfowl biologist who banded the duck in March near Fallon Nevada. He explained that the module attached to the blue band is a new "geo locating" technology that actually measures the light intensity every hour of the day. He asked me to cut the zip strip and send him the module. He can connect the module to his computer, download the stored light intensity data, and his software can locate the longitude and latitude of the bird every day based on the light intensity measurements. How cool. He explained it is a $150 module. He banded 25 drake wood ducks in March and mine is the first call/return. He also banded 50 canvasbacks, and has received 3 back so far. The biologist will return the module to me with a new zip strip to put on my call lanyard with the band. He'll include the full report of the duck's location by day since March. He's very curious the migration pattern of these wood ducks as this is the first GPS or geo locating study ever done on wood ducks. So if you get lucky like I did and shoot one, please call the number and return the module so he gets the data. You'll get it back for your trophy on your lanyard.