High Priority Species

Click on any photo below to learn more about the negative impacts caused by each of these invasive species.

Flowering Rush

Butomus umbellatus Photo credit: © Julia Roeser/Flickr Flowering Rush

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Flowering Rush

(Butomus umbellatus)

Spiny Waterflea

Bythotrephes longimanus Photo credit: Michigan Sea Grant

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Spiny Waterflea

(Bythotrephes longimanus)

Fishhook Waterflea

Cercopagis pengoi Photo credit: Mirja Rosenberg

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Fishhook Waterflea

(Cercopagis pengoi)

Northern Snakehead

Channa argus Photo credit: U.S. Geological Survey, Bugwood.org

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Northern Snakehead

(Channa argus)

Didymo

Didymosphenia geminata Photo credit: Sarah Spaulding, U.S. Geological Survey

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Didymo

(Didymosphenia geminata)

Quagga Mussel

Dreissena bugensis Photo credit: Lyndsey Manzo, Ohio Sea Grant & Stone Laboratory/Flickr

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Quagga Mussel

(Dreissena bugensis)

Mudmat

Glossostigma cleistanthum Photo credit: Robert Whyte (at Bush Blitz Kiwirrkurra, funded by the Australian Government and BHP Billiton)

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Mudmat

(Glossostigma cleistanthum)

Giant Hogweed

Heracleum mantegazzianum Photo credit: Pixabay.com

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Giant Hogweed

(Heracleum mantegazzianum)

Hydrilla

Hydrilla verticillata Photo credit: Robert Vidéki, Doronicum Kft., Bugwood.org

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Hydrilla

(Hydrilla verticillata)

Common Frogbit

Hydrocharis morsus-ranae Photo credit: © Steffi Gehrig/Flickr

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Common Frogbit

(Hydrocharis morsus-ranae)

Spotted Lanternfly

Lycorma delicatula Photo credit: Lawrence Barringer, Pennsylvania Department of Agriculture, Bugwood.org

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Spotted Lanternfly

(Lycorma delicatula)

White Perch

Morone americana Photo credit: Nate Tessler, EnviroScience Inc., Bugwood.org

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White Perch

(Morone americana)

Round Goby

Neogobius melanostomus Photo credit: Center for Great Lakes and Aquatic Sciences, University of Michigan, Bugwood.org

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Round Goby

(Neogobius melanostomus)

Starry Stonewort

Nitellopsis obtusa Photo credit: Jim Grazio, PA DEP, 2015

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Starry Stonewort

(Nitellopsis obtusa)

Yellow Floating Heart

Nymphoides peltata Photo credit: 영철 이, Flickr Creative Commons

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Yellow Floating Heart

(Nymphoides peltata)

Virile Crayfish

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Pennsylvania

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High Priority Species

Click on any photo below to learn more about the negative impacts caused by each of these invasive species.

Flowering Rush

(Butomus umbellatus)

Spiny Waterflea

(Bythotrephes longimanus)

Fishhook Waterflea

(Cercopagis pengoi)

Northern Snakehead

(Channa argus)

Didymo

(Didymosphenia geminata)

Quagga Mussel

(Dreissena bugensis)

Mudmat

(Glossostigma cleistanthum)

Giant Hogweed

(Heracleum mantegazzianum)

Hydrilla

(Hydrilla verticillata)

Common Frogbit

(Hydrocharis morsus-ranae)

Spotted Lanternfly

(Lycorma delicatula)

White Perch

(Morone americana)

Round Goby

(Neogobius melanostomus)

Starry Stonewort

(Nitellopsis obtusa)

Yellow Floating Heart

(Nymphoides peltata)

Virile Crayfish

(Orconectes virilis)