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Be on the Lookout for these Invaders!

If you find any of these emerging invasive species in Pennsylvania, 

report your observations to iMapInvasives so your findings may be directed to the appropriate officials.

Be an Early Detector

In 2017, the Pennsylvania Natural Heritage Program (PNHP) received funding from the Wild Resources Conservation Program to determine invasive plants likely to arrive in Pennsylvania over the next ten years, species considered "emerging threats" to the Commonwealth.


The project identified 12 species, each of which are highlighted in a brochure created by the PNHP.  Citizen scientists and natural resource professionals are encouraged to be on the lookout for these species and report their findings to iMapInvasives.

Note: Some text in the brochure is upside-down. This is necessary to ensure a proper format for printing. Brochure size is 11" x 17".

WRCP brochure.PNG

Marsh Thistle (Cirsium palustre)

Photo credit: Luis Mata, CC-BY-NC-SA 2.0

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