Priority Species

Priority species that are not present in Missoula County:

  • Quagga mussels (Dreissena bugensis) and zebra mussels (Dreissena polymorpha)
  • Asiatic clam (Corbicula fluminea)
  • Flowering rush (Butomus umbellatus)
  • Eurasian water-milfoil (Myriophyllum spicatum)
  • Brazilian waterweed (Egeria densa)
  • Parrotfeather milfoil (Myriophyllum aquaticum)
  • Hydrilla (Hydrilla verticillata)
  • Yellow floating heart (Nymphoides peltata)

Priority species that are or may be present in Missoula County:

  • Red-eared slider (Trachemys scripta)
  • Snapping turtle (Chelydra serpentine)
  • American bullfrog (Lithobates catesbeianus)
  • Fragrant water-lily (Nymphaea odorata)
  • Curly-leaf pondweed (Potamogeton crispus)


Asiatic clam Quagga mussels