This data shows streams in the current range of Hungerford's Crawling Water Beetle (Brychius hungerfordi; HCWB) that may contain suitable habitat. Suitability is based on average July temperature, baseline flow, network catchment soil permeability, and a habitat model. Additional streams not shown in this data may also contain suitable habitat for HCWB.
This data file displays streams within the current range of HCWB that may contain suitable habitat for HCWB. This stream layer was built based on data from Michigan DNR, US Geological Survey, and US Fish and Wildlife Service. The map is based on stream temperatures, flow rates, network catchment soil permeability, and relative habitat suitability based on a Maxent model created by MDNR. Only perennial streams are included. Streams in this layer are categorized as cold, cold transitional, or warm transitional, have a flow rate between 2 and 45 cfs, and are in catchments with a soil permeability rate between 3.36 and 13.16 micrometers/day. A relative habitat suitability model was used to remove any streams where all parts of the stream were ranked with less than 25% relative habitat suitability in most watersheds. In the Perry Creek - Au Sable River Watershed (HUC 10 0407000705), the habitat suitability model was not used to remove streams because HCWB was recently discovered (June 2025) in a stream that had low modeled habitat suitability. Streams where surveys have concluded HCWB habitat was not present were also manually removed. Streams where HCWB have been detected have also been manually added.
This data file also displays stream segments where HCWB have been detected within 1 mile. The HCWB_1mi attribute value is no if HCWB have not yet been detected within 1 mi, and yes if HCWB have been detected within 1 mi. It is recommended to use this attribute to assign symbology.
This layer was last updated in June 2025.
U.S. Fish and Wildlife Service, Region 3, Michigan Ecological Services Office, Michelle Kane
The United States Fish and Wildlife Service (Service) shall not be held liable for improper or incorrect use of the data described and/or contained herein. While the Service makes every reasonable effort to ensure the accuracy and completeness of data provided for distribution, it may not have the necessary accuracy or completeness required for every possible intended use. The Service recommends that data users consult the associated metadata record to understand the quality and possible limitations of the data. The Service creates metadata records in accordance with the standards endorsed by the Federal Geographic Data Committee.
As a result of the above considerations, the Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of the data. It is the responsibility of the data user to use the data in a manner consistent with the limitations of geospatial data in general and these data in particular. Although these data have been processed successfully on a computer system at the Service, no warranty, expressed or implied, is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This applies to the use of the data both alone and in aggregate with other data and information.
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