Hungerford's crawling water beetle

Hungerford's crawling water beetle (Brychius hungerfordi) is a critically endangered member of the family Haliplidae of water beetles found in northeastern North America. The US Fish and Wildlife Service Draft Recovery Plan for the species published in August 2004 estimates roughly 1000 individuals are present in the wild. In 2010, a five-year summary report by the United States Fish and Wildlife Service found the population to be essentially unchanged.

The species was first discovered by entomologist Paul J. Spangler in 1954.