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Alligatorweed (Alternanthera philoxeroides)

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Alligatorweed

(Alternanthera philoxeroides)

Pennsylvania

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Invertebrates

Allegheny Crayfish

Allegheny Crayfish

Orconectes obscurus Photo credit: © Aleta Karstad/Flickr

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Allegheny Crayfish

(Orconectes obscurus)

Big Water Crayfish

Big Water Crayfish

Cambarus robustus Photo credit: © Aleta Karstad/Flickr

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Big Water Crayfish

(Cambarus robustus)

Calico crayfish

Calico crayfish

Orconectes immunis Photo credit: © Mark Lethaby/Flickr

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Calico Crayfish

(Orconectes immunis

White River Crayfish

White River Crayfish

Procambarus acutus Photo credit: Tony Palacios, iNaturalist (Encyclopedia of Life)

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White River Crayfish

(Procambarus acutus)