The Advanced Search allows you to find species with specific characteristics.
The Rank and Status will search based on how that species is ranked by NatureServe (Global Ranks),
the Montana Natural Heritage Program (State Ranks), and by federal agency status.
Look for this PDF icon at the top of each page as you search and browse. You can download select species by searching or when you're on a Taxa page like Class, Order, and Family.
Here's some links if you want to download a whole group.