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![Rocky Mountain Bighorn Sheep. Mike Delliveneri/CPW](/sites/default/files/styles/coh_x_small/public/2024-06/bighorn_sheep.png?itok=2jG_wVJC)
invasive
Rocky Mountain Bighorn Sheep
Mammal - Ovis canadensis
![Roundtail Horned Lizard, Patrick Alexander, CC0](https://cpw.widen.net/content/93a130ba-d850-42e2-99fe-3819881a3ce5/web/Roundtail%20Horned%20Lizard%20Patrick%20Alexander%20CC0%20Profile.jpg?w=480&itok=XW8h1zHl)
invasive
Round-tailed Horned Lizard
Reptile - Phrynosoma modestum
![Rubber Boa, NPS.](https://cpw.widen.net/content/d6e20fe0-3610-46d9-b5d8-74cd12358bf8/web/Rubber%20Boa%20NPS%20Profile.jpg?w=480&itok=cY2cFgKI)
invasive
Rubber Boa
Reptile - Charina bottae
![Rusty Crayfish, Peter Pearsall, FWS](https://cpw.widen.net/content/6a88fd62-e5b0-40b6-b098-c7ef12f4436e/web/Rusty%20Crayfish%20Peter%20Pearsall%20FWS%20Profile.jpg?w=480&itok=u01x-Bof)
invasive
Rusty Crayfish
Crustacean - Orconectes rusticus
invasive
Sacramento Perch
Fish - Archoplites interruptus
invasive
Sauger
Fish - Sander canadensis
invasive
Saugeye
Fish -
![This species needs a photo.](https://cpw.widen.net/content/4c3f462c-9cb0-4b0b-a3e8-2e3dd11a0592/web/This%20species%20needs%20a%20photo.png?w=480&itok=vGa_A6Rk)
invasive
Sharp Sprite
Mollusk - Promenetus exacuous
![Silver Haired Bat, Virginia State Parks](https://cpw.widen.net/content/cf3fa617-9b10-4fdc-897b-8a5ce2361bb7/web/Silver%20Haired%20Bat%20Virginia%20State%20Parks%20Profile.jpg?w=480&itok=ztUyZhDs)
invasive
Silver-haired Bat
Mammal - Lasionycteris noctivagans
![Six-lined Racerunner, Tony Hober, CPW](https://cpw.widen.net/content/62027b34-8881-4515-b6df-a06120f95e6c/web/Six-lined%20Racerunner%20Tony%20Hober%20CPW%20Profile.jpg?w=480&itok=N3HeJlfX)
invasive
Six-lined Racerunner
Reptile - Aspidoscelis (Cnemidophorus) sexlineata
invasive
Smallmouth Bass
Fish - Micropterus dolomieu
![Smiths Black-headed Snake, Hobart Smith, NPS](https://cpw.widen.net/content/54947b87-cb30-4039-ab26-312baaaa6f84/web/Smiths%20Black-headed%20Snake%20Hobart%20Smith%20NPS%20Profile.jpg?w=480&itok=DxAyelht)
invasive
Smith's Black-Headed Snake
Reptile - Tantilla hobartsmithi
![Smooth Green Snake (Opheodrys_vernalis), Don F Becker, CC0](https://cpw.widen.net/content/9e5754af-267f-4233-9183-046c1c2ad65d/web/Smooth_Green_Snake_(Opheodrys_vernalis)_Don%20F%20Becker%20CC0%20Profile.jpg?w=480&itok=xv22cQ-h)
invasive
Smooth Greensnake
Reptile - Opheodrys (Liochlorophis) vernalis