Common Kingsnake — Care Sheet & Morphs

Q: How big does an adult Common Kingsnake get?

An adult Common Kingsnake typically measures 1–1.8 m.

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 2 named combos for Common Kingsnake.

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

Named combos — 2 documented combined morphs

SnowGhost

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.

How big does an adult Common Kingsnake get?▾

An adult Common Kingsnake typically measures 1–1.8 m (common adult size 100-150 cm; large robust females can reach 180-200 cm (rare). massive body, smooth and glossy scales.).

What temperature and humidity does a Common Kingsnake need?▾

A gradient of roughly 22–25 °C on the cool side to 28–30 °C on the warm side, with a basking spot of 30–32 °C. Humidity 40–60 %.

What does a Common Kingsnake eat?▾

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

Is the Common Kingsnake a good reptile for beginners?▾

Beginner level. Robust and confident snake, NON-VENOMOUS (kills its prey by constriction). Legendary feeding response: it can mistake a hand for prey, hence the importance of a hook or a feeding cue. Generally docile and easy to handle once accustomed, but it may release musk, defecate and writhe vigorously when stressed. To be housed and fed strictly alone (ophiophagous: risk of cannibalism and serious bites when cohabited). Plan ahead: a lifespan of 15–25 yrs.

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