found this and thought i would share it.
http://agfc.cast.uark.edu/AnimalTracking/mallards/map.aspx

I have tracked them in years past.
Either last year or year before one was killed at Caryle.
Looks like they only put transmitters on hens.

link no worky.... I woudl like to check that out. If it is what I think you guys are talking about.

It worked for me....
http://agfc.cast.uark.edu/AnimalTracking/mallards/map.aspx