What is the best way to view the least-seen species in a county?

Thank you. That’s interesting. When I tried it myself though (by copying and pasting the queries in), the “in common” look reasonable, but the “not in common” includes species I know I have, and aren’t monocots:

I’m not sure what “unique” is supposed to be. I thought the “not in common” would be the ones I haven’t seen.