Faxonius immunis
Faxonius immunis
(calico crayfish)
Crustaceans-Crayfish
Native Transplant
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5 results for Faxonius immunis (calico crayfish)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1753549 COLarimerpond, 15 mi W Masonville, just W Buckhorn Ranger Station1982 10190006 Big Thompson 
1753539 CORouttLake Catamount, 5 mi S Steamboat Springs2009 14050001 Upper Yampa 
1396016 CORouttOak Creek @ CO-22 Rd above Yampa River2001 14050001 Upper Yampaestablished
1396052 CORouttOak Creek @ CO-22 Rd above Yampa River2001 14050001 Upper Yampaestablished
1753562 COWeldLittle Thompson River, 4 mi SW Johnstown2000 10190006 Big Thompson 

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

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The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [3/25/2025].

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For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.