Ryan Collister:
Cottonmouth, Agkistrodon piscivorous
Ryan Collister:
Cottonmouth, Agkistrodon piscivorous
Ryan Collister:
Northern Pacific rattlesnake, Crotalus oreganus oreganus
Ryan Collister:
Northern Pacific rattlesnake, Crotalus oreganus oreganus
Ryan Collister:
Texas alligator lizard (Gerrhonotus infernalis)