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Alligatorweed

(Alternanthera philoxeroides)

Pennsylvania

iMapInvasives

As of April 2019, there are 398 invasive species being

tracked in the Pennsylvania iMapInvasives database.

All tracked species are considered invasive because they are non-native to Pennsylvania and known to cause

harm to the economy, environment, or human health. All tracked species have either been discovered

in Pennsylvania or are known to exist in neighboring states.

Contact the state administrator if you would like to add a new species to our tracked list.

Red-eared slider

Trachemys scripta elegans

Photo credit: © Rosmarie Alenius/Flickr

Flowering rush

Butomus umbellatus

Photo credit: © Julia Roeser/Flickr

Oriental bittersweet

Celastrus orbiculatus

Photo credit: Flickr user "Slow Turning"

Red swamp crayfish

Procambarus clarkii

Photo credit: © Ted van den Bergh/Flickr

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Tracked Species

ALL SPECIES

View all species currently tracked in the Pennsylvania iMapInvasives database.

SPECIES CATEGORIES

View tracked species by category.

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Early Detection

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High Priority

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Noxious Weeds

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Pennsylvania Fish & Boat Commission (Banned)

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Terrestrial Plants

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Aquatic Plants

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Wetland Plants

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Mammals

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Birds

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Insects

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Fish

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Diatoms

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Reptiles

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Algae

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Invertebrates