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National Invasive Species Information Center
U.S. Department of Agriculture

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Displaying 21 to 27 of 27

  • Nonindigenous Aquatic Species Database: Point Map - Rusty Crayfish

    • DOI. USGS. Wetland and Aquatic Research Center.

    • Provides detailed collection information as well as animated map.

  • Priority Species: Invasive Crayfish

    • Washington State Recreation and Conservation Office. Washington Invasive Species Council.

  • Public Asked to Watch for Rusty Crayfish in Laramie River Watershed

    • May 19, 2021

    • Wyoming Game & Fish Department.

    • Anglers, crayfish trappers, and other outdoor recreationists are asked to help the Wyoming Game and Fish Department protect our outstanding fisheries by reporting any rusty crayfish found in the Laramie River watershed. Rusty crayfish (Orconectes rusticus) are native to the Ohio River Basin, but have invaded many other states and Canadian provinces. They were first discovered in Wyoming in 2006 after being illegally introduced into private ponds and then escaping into Wagonhound Creek, a tributary of the North Platte River. Despite the Game and Fish Department’s early eradication efforts, the species has recently been found in the Laramie River as a result of another illegal introduction.

      Rusty crayfish are 3-5 inches long, with a grayish-green body and easily-identifiable reddish fingerprint-like spots on each side of the body just in front of the tail. If you find a rusty crayfish, or catch one in a trap, take a photo of it and either return it to the water or kill it. Then contact the Laramie Game and Fish Department at (307) 745-4046 or reportais@wyo.gov.

  • Rusty Crayfish

    • Tip of the Mitt Watershed Council (Michigan).

  • TISI Inventory - Rusty Crayfish

    • Texas State University System. Texas Invasive Species Institute.

  • Top Invasive Concerns: Rusty Crayfish

    • Colorado Parks and Wildlife.

    • The Colorado Division of Wildlife is monitoring the state's waters for the introduction of an aggressive invasive species, the rusty crayfish. Rusty crayfish were found for the first time in Colorado during routine sampling operations in 2009 in the Yampa River drainage between Steamboat Springs and the town of Yampa. Because of their larger size and more aggressive nature, rusty crayfish can impact fish populations by consuming small fish and fish eggs, and negatively impact fish and spread unwanted aquatic plants by aggressively harvesting underwater plant beds. Learn more how to identify the rusty crayfish, how to stop the spread and how to report sightings.

  • YouTube - Know Your Invasives: Rusty Crayfish

    • Google. YouTube; University of Wisconsin-Madison. Center for Limnology.