Common Kingsnake — Care Sheet & Morphs

Husbandry requirements

Common Kingsnake — origin: North America: eastern and southern United States, from New Jersey to Florida and westward to the Mississippi. Occupies varied habitats (forests, grasslands, wetlands, semi-arid environments)..

Terrarium temperature gradient

Night min18 °C

Cool side22–25 °C

Warm side28–30 °C

Basking spot30–32 °C

A thermal gradient is essential. Hot spot/thermoregulation zone at 30-32 °C, cool side at 22-25 °C. A natural nighttime drop down to ~18-20 °C is tolerated. Heating (mat or remote cable/spot) ALWAYS controlled by a thermostat; secure the accessible surface to prevent burns.

Enclosure (adult)

120 × 60 × 60 cm

Horizontal terrestrial terrarium, perfectly secured

Excellent escaper and burrower: a lockable lid and tight openings are essential. Provide at least two hides (warm side and cool side), low branches and a humid hide. 120x60x60 cm is a minimum for an adult; bigger is always better.

Humidity

40–60 %

Rather dry to moderate atmosphere (40-60%). Temporarily raise to 60-70% via a humid hide during shedding to avoid incomplete sheds.

Substrate

Aspen shavingsCypress mulchCoconut fibreBeech or orchid bark

Dry, absorbent substrate that allows burrowing. BAN cedar and pine (toxic volatile oils). Remove faeces promptly and replace the substrate regularly to limit mites and bacteria.

UVB

Optional

Not essential (crepuscular species fed whole prey), but low-level UVB (UVI 1-2, low-intensity T5 tube) is beneficial for well-being and metabolism. Photoperiod of 10-12 h, reduced during brumation.

Water source

Always available

Large bowl of clean water available at all times, wide enough to let the snake soak, particularly before shedding. Clean and renew the water regularly.

Origin

Colubridae

North America: eastern and southern United States, from New Jersey to Florida and westward to the Mississippi. Occupies varied habitats (forests, grasslands, wetlands, semi-arid environments).

Feeding & health

Diet

Carnivore (rodent-eating in captivity) — Appropriately sized rodents (pinkies then juvenile mice/rats), thawed and warmed

In the wild, an opportunistic ophiophage: it eats other snakes (including venomous ones, to which it is partly immune), lizards, birds, eggs and rodents. In captivity, a rodent-only diet. Juveniles fed every 5-7 days, adults every 7-10 days. Feed ALONE, with a hook/tongs, to avoid accidental bites and cannibalism. Do not overfeed.

Breeding

Oviparous

Clutch 5–15 eggs/young. Clutch of 5-15 eggs (sometimes more) in spring, after a winter brumation (~4-8 weeks at 10-15 °C) that stimulates reproduction. Incubation of about 55-65 days at 27-28 °C. Very common species, widely bred in captivity, with numerous morphs.

Health watch points

Difficult shed (dysecdysis) linked to too-low humidity or a lack of humid hide
Regurgitation (inadequate temperature, prey too large, or handling too soon after a meal)
Snake mites (Ophionyssus natricis)
Obesity from overfeeding and inactivity
Stomatitis (mouth rot) and respiratory infections linked to poor hygiene or thermoregulation

Morphs & genetics

Registry of 5 documented genes and 1 named combos for Common Kingsnake.

Albino (T-) amelanisticRec
Hypomelanistic (Florida Line) brooks hypoDom
Axanthic aneryRec
Mosaic / Whitesided white sideInc.d
Lavender (T+) albino t+Rec

Named combos — 1 documented combined morphs

Snow

Pairing calculator

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

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Common Kingsnake × Common Kingsnake

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 common kingsnake.

Is the common kingsnake suitable for someone new to reptile-keeping?▾

Absolutely — it's one of the most recommended colubrids for getting started: robust, confident, and undemanding, provided you're ready for its strong feeding response at mealtimes.

How big does this species get as an adult?▾

The typical adult size ranges from 100 to 150 cm, though large, well-fed females can exceptionally reach 180 or even 200 cm. The body is heavy-set, with smooth, glossy scales.

What size terrarium should be provided for an adult?▾

Plan for at least 120 x 60 x 60 cm, with a lid that locks perfectly — it's a formidable burrower and escape artist. At least two hides, one on the warm side and one on the cool side, are essential.

What temperature gradient should be set up?▾

Aim for a hot spot of 30-32 °C, a warm side of 28-30 °C, and a cool side of 22-25 °C, always controlled by a thermostat. A nighttime drop down to 18-20 °C is natural and well tolerated.

What substrate is best, and which one should be strictly avoided?▾

Aspen, coconut fibre, or beech bark all work very well. Cedar and pine, on the other hand, must be avoided entirely, as their volatile oils are toxic to this snake.

Why does this snake have a reputation for mistaking hands for prey?▾

Its feeding response is legendary: at mealtimes it can reflexively bite a hand that smells of rodent. Using tongs or a consistent feeding cue helps avoid any incident.

Can two kingsnakes be housed together?▾

No, never. In the wild it's an opportunistic ophiophage that eats other snakes, including venomous ones, to which it's partly immune — cohabitation would carry a real risk of cannibalism and serious bites. Each individual must be housed and fed strictly alone.

What should it be fed, and how often?▾

In captivity it feeds exclusively on thawed, warmed rodents of an appropriate size: every 5-7 days for a juvenile, 7 to 10 days for an adult. Don't overfeed it — obesity quickly threatens this species, which is very eager at mealtimes.

How long can it live?▾

15 to 20 years in captivity is the norm, sometimes more with appropriate care: a long-term commitment to plan for before adopting one.

Where does this species come from, and what is its natural activity pattern?▾

It's found in the eastern and southern United States, from New Jersey to Florida and west to the Mississippi, across a wide range of habitats. It's diurnal to crepuscular, with peaks of activity at sunrise and sunset.

What are the most common health issues?▾

Difficult shedding from insufficient humidity, regurgitation after too large a meal or handling too soon after eating, and obesity linked to overfeeding are the most common issues to watch for.

Does it need brumation to breed?▾

Yes, a winter brumation of 4 to 8 weeks at 10-15 °C stimulates reproduction. Clutches contain 5 to 15 eggs, incubated for about 55 to 65 days at 27-28 °C — a species very widely bred in captivity, with numerous morphs available.

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