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Alligatorweed
(Alternanthera philoxeroides)
Found an invasive species? Register for a free login account, or submit a public report.
Photo credit: © Aleta Karstad/Flickr
Big Water Crayfish
(Cambarus robustus)
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.
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Not a registered user? Submit a public report.
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Watch our training video to learn how to submit an observation record (as a registered user).
Species at a Glance
Learn more about the Big water crayfish and its impacts by viewing information available from USGS NAS.
*To date, this species has not been found outside its native range within Pennsylvania.
Range Information
The map below depicts only the native range of Big water crayfish in Pennsylvania, displayed using a HUC 12 watershed layer.
Data used to create this map was provided by:
Native range
Invasive range
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