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Contact information
For information on Wisconsin's rare vertebrate animals, contact:
Rich Staffen
Conservation Biologist
For information on Wisconsin's rare invertebrates, contact:
Jay Watson
Conservation Biologist

Beaver Beetle (Platypsyllus castoris)

Need a main photo for this animal


There is no overview information available for that species.

State status

Status and Natural Heritage Inventory documented occurrences in Wisconsin

The table below provides information about the protected status - both state and federal - and the rank (S and G Ranks) for Beaver Beetle (Platypsyllus castoris). See the Working List Key for more information about abbreviations. Counties shaded blue have documented occurrences for this species in the Wisconsin Natural Heritage Inventory database. The map is provided as a general reference of where occurrences of this species meet NHI data standards and is not meant as a comprehensive map of all observations.

Note: Species recently added to the NHI Working List may temporarily have blank occurrence maps.

Platypsyllus castoris is not tracked by the Wisconsin Natural Heritage Inventory Program at this time (this species is not on the NHI Working List).
Summary Information
State Statusnone
Federal Status in Wisconsinnone
State RankSU
Global RankG5
Tracked by NHIW

Species guidance

Identification: Beetle, approximately 2mm long, dorsal-ventrally flattened, lamellate antenna, and modified louse-like body plan.

Habitat: Found on beaver skin. An obligate host that feeds on the outer flakes of lose skin (dandruff) and does not devalue fur quality or cause pathology to the beaver.

State Distribution: Found commonly throughout Northern Wisconsin, and becoming uncommon to rare approaching the southern portion of the state.

Status Comments: Discovered in Wisconsin in 1992 in Sawyer Co.

Phenology: Summer.


No additional photos are available for Beaver Beetle at this time. Please consider donating a photo to the Natural Heritage Conservation program.

Last revised: Thursday, December 22, 2022