Banded Water Snake
Nerodia fasciata • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Natricinae, Genus: Nerodia, Species: Nerodia fasciata
Venomous Status
Non-venomous (Aglyphous - lacking specialized venom-conducting fangs)
Danger Level
Harmless / Low Risk. They are non-venomous and pose no threat to life, though they are highly defensive and will bite repeatedly if handled, which can cause minor bleeding due to anticoagulant properties in their saliva.
Geographic Range
Found throughout the Southeastern United States, ranging from North Carolina down through Florida and west along the Gulf Coast to Texas and up the Mississippi River Valley to southern Illinois.
Conservation Status
IUCN Red List: Least Concern. Generally abundant, though they face threats from habitat loss and frequent persecution by humans who mistake them for venomous cottonmouths.
Physical Description
A heavy-bodied snake with strongly keeled (rough) scales. Coloration is typically dark brown, reddish, or black with darker crossbands that are widest on the back. Head is distinctly wider than the neck, with prominent labial (lip) scales marked by vertical black bars. Pupils are round.
Size & Dimensions
The specimen in the image appears to be a mature adult approximately 2.5 to 3 feet in length. Typical species range is 24-42 inches (61-107 cm); the record is 60 inches.
Habitat
Semi-aquatic. Found in almost any freshwater environment including swamps, marshes, ponds, lakes, and slow-moving streams. Often found basking on logs or in vegetation overhanging water.
Behavior & Temperament
Highly defensive when cornered; they will flatten their bodies and heads to appear larger, hiss loudly, and strike repeatedly. They often release a foul-smelling musk from the cloaca when handled. Mostly nocturnal or crepuscular in hot weather, diurnal in cooler months.
Diet & Feeding
Active foragers that feed primarily on amphibians (frogs, toads, tadpoles) and small fish. They hunt by swimming through the water or wait in ambush along the shoreline, swallowing prey alive without constriction.
Reproduction
Viviparous (gives birth to live young). Mating occurs in spring; females give birth to 15-20 (up to 50) young between July and October.
Venom & Safety
Venom Type
Non-venomous - no medically significant venom.
First Aid Advice
No medical intervention is usually required for a bite from this non-venomous species. Clean the wound thoroughly with soap and water to prevent secondary infection. If bitten by an unidentified snake, seek professional medical evaluation.
Look-alikes
Commonly confused with the venomous Northern Cottonmouth (Agkistrodon piscivorus). Distinct from Cottonmouths by having round pupils (vs. vertical slits), vertical labial bars, and lacking the dark facial mask that runs through the eye of the Cottonmouth.
Conservation Status
IUCN Red List: Least Concern. Generally abundant, though they face threats from habitat loss and frequent persecution by humans who mistake them for venomous cottonmouths.
Cultural Significance
Often used in ecology studies as an indicator of wetland health. Frequently misunderstood and killed due to its resemblance to venomous species, leading to educational efforts focused on 'Cottonmouth vs. Water Snake' identification.
Notable Features
Features heavily keeled scales and a salt-and-pepper or reddish belly pattern. They are known for their ability to thrive in urban retention ponds and canals.