To tag birds migrating, the U.S. Department of the Interior used metal bands that bear the address of the Washington Biological Survey, abbreviated: 
Wash. Biol. Surv. 
Until the agency received the following letter from a camper: 
Dear Sirs, 
While camping last week I shot one of your birds. I think it was a crow. I followed the cooking instructions on the leg tag and I want to tell you it was horrible.