Hungerford’s Crawling Water Beetle
A federally endangered beetle smaller than a grain of rice survives in a few cold northern streams, mostly within Michigan.
Artwork inspired by Sarkis Sarkisian
Hungerford’s crawling water beetle is known from only a small number of Michigan and Ontario streams. Adults and larvae live in flowing water, often near gravel, woody structure, and the aquatic plant Chara, where oxygen, temperature, current, and clean substrate remain suitable.
Its rarity is inseparable from watershed condition. Dams, culverts, sediment, contaminants, bank alteration, water withdrawal, and changing flow can damage habitat beyond the exact point where a beetle was collected. Observation is therefore specialist work, not a reason for recreational netting.
- Status
- Federally endangered
- Range
- Michigan and Ontario
- Scale
- Only millimeters long
Quick guide
- Best chance
- Leave detection to authorized specialist surveys
- Protect
- Preserve cold flow across clean gravel habitat
Understand a stream insect best left to specialists
- Begin with scale
- Adults are only a few millimeters long; naked-eye identification in moving water is unrealistic.
- Know the silhouette
- The body is narrow and streamlined, unlike broad oval predaceous diving beetles.
- Record habitat first
- Photograph flow, substrate, vegetation, barriers, and bank condition without entering a protected survey reach.
- Leave sampling to permits
- Do not kick-net, collect, move gravel, or disclose sensitive stations; report habitat threats to the responsible agency.
Good to know
“Water beetle” does not mean it inhabits any pond or river. This species is tied to particular flowing-stream conditions, and protecting connectivity and upstream water quality is central to protecting the animal.
Notice these
- elongated tiny body
- dark linear markings
- cool flowing stream