Banded water snake — Care Sheet & Morphs

Q: How big does an adult Banded water snake get?

An adult Banded water snake typically measures 0.6–1.1 m.

Husbandry requirements

Banded water snake — origin: Southeastern United States (from the Carolinas to Florida, as far as Texas), along watercourses, marshes, ponds and coastal wetlands..

Terrarium temperature gradient

Night min20 °C

Cool side22–24 °C

Warm side28–30 °C

Basking spot30–32 °C

NON-VENOMOUS but strongly resembles the venomous cottonmouth (Agkistrodon piscivorus): it has a round pupil and no loreal pit. Its slightly anticoagulant saliva makes bites bleed but without toxic danger. Not listed on CITES; wild collection is strongly discouraged (stress, parasites, protected status in some US states) — favour a captive-bred animal. Establish a clear thermal gradient: hot spot/basking 30-32 °C above the dry platform, cool side 22-24 °C, a nighttime drop tolerated down to ~20 °C; heat the land area rather than the water.

Enclosure (adult)

120 × 60 × 60 cm

Semi-aquatic terrarium / paludarium: large permanent water area + dry land area with a resting spot and hides on both sides.

Minimum dimensions for an adult (120x60x60 cm). Provide sufficient height and a well-secured lid, as the species is agile and can escape. A large water surface (allowing full immersion) combined with a dry platform for basking is essential.

Humidity

50–70 %

Moderate to high humidity, naturally maintained by the large water surface. Ensure good ventilation to avoid stagnant air and skin problems.

Substrate

Absorbent paper / paper towel (simple, very hygienic setup)Cypress mulchCoconut fibre

For the land part, an easy-to-clean substrate is recommended as the species soils its environment a great deal. Avoid aspen, which moulds on contact with moisture. A simple setup (paper + large water container) makes maintenance and health monitoring easier.

UVB

Optional

Not strictly essential for this colubrid, but a low UVB (UV index 1-2, T5 5% tube) is beneficial for this diurnal semi-aquatic species that basks in the sun; combine with a regular day/night cycle.

Water source

Always available

A large, clean, permanent water area allowing complete immersion. The animal often defecates and feeds in the water: effective filtration and/or frequent water changes are essential to prevent skin infections. Clean and disinfect regularly.

Origin

Colubridae

Southeastern United States (from the Carolinas to Florida, as far as Texas), along watercourses, marshes, ponds and coastal wetlands.

Feeding & health

Diet

Piscivore / amphibian-eater — Fish and amphibians (frogs); can be accustomed to fish-scented rodents.

Absolutely avoid fish rich in thiaminase (goldfish, smelt), which cause a thiamine (vitamin B1) deficiency: favour trout, tilapia, capelin, silverside. Vary the diet and supplement with vitamin B1 if the diet relies heavily on fish. Feeding outside the main tank reduces the risk of accidental bites and water contamination.

Breeding

Viviparous

A very prolific species. Breeding is generally triggered by a winter brumation period (cooling to 12-16 °C for several weeks) followed by spring warming. Birth in late summer; the newborns are independent and quickly feed on small fish.

Health watch points

Skin infections / scale rot (scale rot, blister disease) linked to dirty water or an environment that is too humid and poorly ventilated
Significant internal parasitism, especially in wild-caught individuals (trematodes, nematodes transmitted by fish and amphibians)
Thiamine (vitamin B1) deficiency due to a diet of fish rich in thiaminase
Respiratory infections (temperatures too low or stagnant humidity)
Stomatitis (mouth rot) and regurgitation / food refusal linked to stress

Morphs & genetics

Registry of 3 documented genes and 2 named combos for Banded water snake.

Albino (T-) amelanisticRec
Hypomelanistic hypoRec
Anerythristic (Hypothetical) axanthicRec

Named combos — 2 documented combined morphs

SnowSunglow

Pairing calculator

Pick each parent's genotype — clutch probabilities update live. Free, no sign-up.

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Banded water snake × Banded water snake

Probabilities per gene (independent loci).

Expected clutchSelect at least one gene on a parent.

Frequently asked questions

Answers to the most common questions about keeping the banded water snake.

How big does an adult Banded water snake get?▾

An adult Banded water snake typically measures 0.6–1.1 m (typical total adult length 60-110 cm. females, being stouter, occupy the upper end of the range and can exceptionally approach 130-150 cm. stocky body with keeled scales (rough texture).).

What temperature and humidity does a Banded water snake need?▾

A gradient of roughly 22–24 °C on the cool side to 28–30 °C on the warm side, with a basking spot of 30–32 °C. Humidity 50–70 %.

What does a Banded water snake eat?▾

Piscivore / amphibian-eater: Fish and amphibians (frogs); can be accustomed to fish-scented rodents..

Is the Banded water snake a good reptile for beginners?▾

Intermediate level. A nervous and defensive species, especially wild-caught specimens, which bite readily and release a foul-smelling musk. Captive-bred individuals can become docile but remain very voracious (food aggression): handle with caution outside of meals. Plan ahead: a lifespan of 10–15 yrs.

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