Montana's large size, 147,046 square miles (380,850 km²), and diverse Ecological systems of Montana make it home to a diverse array of flora and fauna.

This is a list of flora and fauna of Montana related articles.

This list is incomplete; you can help by adding missing items. (July 2011)

• Club-mosses and mosses of Montana
  • There are at least 23 species of Club-mosses and 153 species of Mosses found in Montana.,^[1][2]
• Coniferous plants of Montana
  • There are at least 20 species of Gymnosperms or Coniferous plants in Montana.^[3]
• Ferns of Montana
• Horsetails of Montana
• Lichens of Montana
  • There are at least 41 species of lichens, Ascomycota known to exist in Montana.^[4]
• Dicotyledons of Montana
  • There are at least 2109 species of dicotyledons found in Montana according to the Montana Field Guide.^[5]
• Monocotyledons of Montana
  • There are at least 615 species of Monocotyledons found in Montana.^[6]

• Amphibians and Reptiles of Montana
  • Montana is home to 14 amphibian species and 20 species of reptiles.
• Birds of Montana
  • There are at least 427 species of birds found in Montana.^[7]
• Molluscs of Montana
  • There are at least 42 species of freshwater bivalves (clams and mussels) known in Montana.^[8] There are also at least 155 species of gastropods found in Montana.^[9]
• Crustaceans of Montana
  • There are at least 30 species of crustaceans found in Montana.^[10]
• Fish of Montana
  • There are at least 31 game and 59 non-game fish species known to occur in Montana.^[11]
• Flatworms and leeches of Montana
• Insects of Montana
• Mammals of Montana
  • There are at least 19 large mammal and 96 small mammal species known to occur in Montana.^[12]
• Millipedes of Montana

• Rydberg, Per Axel PhD (1900). Catalogue of the flora of Montana and the Yellowstone National Park (PDF). New York: New York Botanical Garden.
• Booth, W.E. (1950). Flora of Montana, Part I Conifers and Monocots. Bozeman, Montana: The Research Foundation at Montana State College.
• Wilson, Barbara L. (2008). Field Guide to the Sedges of the Pacific Northwest. Corvallis, OR: Oregon State University Press. ISBN 978-0-87071-197-8.
• Stebbins, Robert C. (1954). Amphibian and Reptiles of Western North America. New York: McGraw-Hill Book Company.
• Werner, J. Kirwin; Bryce A. Maxell; Paul Hendricks; Dennis L. Flath (2004). Amphibians and Reptiles of Montana. Missoula, Montana: Mountain Press Publishing. ISBN 0-87842-500-4.
• Henderson, J (1924). Mollusca of Colorado, Utah, Montana, Idaho and Wyoming. Boulder, CO: University of Colorado Museum.
• "Freshwater Mussels of Montana-A Field Guide" (PDF). Montana Natural Heritage Program. Retrieved 2010-12-28.
• Stagliano, David (2010). Freshwater Mussels in Montana: Comprehensive Results from 3 years of SWG Funded Surveys (PDF). Montana Natural Heritage Program.
• "Montana Fisheries Information System". Montana Department of Fish, Wildlife and Parks. Retrieved 2010-11-25.
• Burr, Brooks M.; Page, Lawrence M. (1991). A Field Guide to Freshwater Fishes : North America North of Mexico (Peterson Field Guides). Boston: Houghton Mifflin Harcourt. ISBN 0-395-91091-9.
• Hoffman, R.S.; Pattie, D.L. (1968). A Guide to Montana Mammals. University of Montana Press.
• "Northern Rockies Natural History Guide-Mammals". University of Montana’s Division of Biological Sciences. Archived from the original on 2010-06-20. Retrieved 2010-11-23.
• Foresman, Kerry R. (2001). The Wild Mammals of Montana. American Society of Mammalogists. ISBN 1-891276-26-3.
• Picton, Harold D.; Lonner, Terry N. (2008). Montana's Wildlife Legacy-Decimation to Restoration. Bozeman, MT: Media Works Publishing. ISBN 978-0-615-18849-2.
• Putnam, Caleb; Kennedy, Gregory (2005). Montana Birds. Auburn, WA: Lone Pine Publishing International. ISBN 1-55105-463-9.
• Tekiela, Stan (2004). Birds of Montana-Field Guide. Cambridge, Minnesota: Adventure Publications. ISBN 1-59193-097-9.
• Wright, Phillip L. (Winter 1996). "Status of Rare Birds in Montana, with Comments on Known Hybrids". Northwestern Naturalist. 77 (3): 57–85. doi:10.2307/3536504. JSTOR 3536504.