Warner Sucker

Photo Credit: Paul Sheerer, ODFW


  • Species Common Name Warner Sucker
  • Species Scientific Name Catostomus warnerensis
  • Federal Listing Status Threatened
  • State Listing Status Threatened


Special needs

Lakes and low-gradient stream reaches of Warner Valley. Prefer pool habitat in streams. Juvenile stage is vulnerable to predation.

Limiting factors

Predation by invasive species. Altered hydrology (low flows). Lack of connectivity between streams and lake.

Conservation actions

Maintain or restore spring waters. Maintain or restore migration corridors among habitat areas. Increase stream flows in lower sections of tributaries. Restore wetland habitat. Evaluate likelihood of long-term persistence in the presence of non-natives.

Key reference or plan

Sheerer, P. and S. Clements. 2012. 2012 Warner Valley Fish Investigations-Warner Suckers. ODFW Progress Report. Sheerer, P., J.T. Peterson, and S. Clements. 2014. 2014 Warner Sucker Investigations (Lower Twentymile Creek). ODFW Progress Report.