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Spiny soft-shell turtle. Sam Stuckel/USFWS

invasive

Spiny Softshell Turtle

Reptile - Apalone (Trionyx) spinifera

This species needs a photo.

invasive

Striated Fingernail Clam

Mollusk - Sphaerium striatinum

Swampy Lymnaea. Hans Zwitzer, BY-SA-NC

invasive

Swampy Lymnaea

Mollusk - Lymnaea (Stagnicola) stagnalis

Swift fox, Greg Schroeder, NPS

invasive

State Special Concern

Swift Fox

Mammal - Vulpes velox

Physa snail. Gail Hampshire CC 2.0

invasive

Tadpole Physa

Mollusk - Physa (Physella) acuta