GRRRRR!!!!!! I had used 4 of my guesses and figured out 2 of the letters when the game locked up on me and I had to start over again. Already knowing the second letter of the code and getting a third letter on my second guess the second time around, I had the first three letters of the code in the right place by my 3rd guess. I couldn't figure out the last letter so I used brute force until something fit, but it wasn't the right fit. More brute force on my 5th guess solved the puzzle but I didn't know what it was so I left BRDL to look it up. When I returned to BRDL, the puzzle reloaded AGAIN. Since I hadn't copied my results to share them, I was forced to play the same puzzle a third time. GRRRRR!!!!
BRDL 201
????
Edit- AM I the only one that thinks this is kind of stretching things? What's next, banding codes for unknown birds? After all, those are on the list too.