With the great database management tools that BUBO utilizes, I have been a bit surprised to find no "best birds" functionality. This is basically the inverse of the "Targets" list and should be fairly trivial to code: your list, with the ordering determined by the number of similar lists with the same bird. Instead of "what's the most-often-seen bird that I haven't seen?" it would be "what's the least-often-seen bird I have seen?"
To the best of my knowledge this isn't available on BUBO yet. I'd love to see it some day though... could be fun!
