Allegheny Crayfish

Photo credit: © Aleta Karstad/Flickr

(Orconectes obscurus)

Report this Species!

If you believe you have found this species in its invasive range in Pennsylvania, please report your findings to iMapInvasives by submitting an observation record.

Species at a Glance

Learn more about the Allegheny crayfish and its impacts by viewing information available from USGS NAS.

Range Information

The map below depicts both the native and invasive ranges of Allegheny crayfish in Pennsylvania, displayed using a HUC 8 watershed layer.

Data used to create this map was provided by:

Native range

Invasive range

Pennsylvania iMapInvasives, invasive here but not there, Allegheny crayfish, Orconectes obscurus

The Pennsylvania iMapInvasives Program is a partnership of the Western Pennsylvania Conservancy, the Pennsylvania Natural Heritage Program, and NatureServe.

Funding for Pennsylvania iMapInvasives is provided by the Great Lakes Restoration Initiative.

NatureServe logo, iMapInvasives partner
Pennsylvania Natural Heritage Program, iMapInvasives partner
Great Lakes Restoration Initiative logo, iMapInvasives funding source