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Mexican kingsnake (Lampropeltis mexicana)

Mexican kingsnake (Lampropeltis mexicana), typical appearance of the species

Snakes · Difficulty: Intermediate

Key facts and care guidance for Mexican kingsnake (Lampropeltis mexicana) (origin: North-eastern Mexico (San Luis Potosí), rocky montane and semi-arid habitats). Adult size around approx. 70–90 cm (around 80 cm; rarely up to ~1 m). Life expectancy 15+ years. The values below are carefully researched guidance.

Short answers

Mexican kingsnake: How big does the enclosure need to be?

From 100×50×50 cm (minimum size according to the 1997 expert report, kingsnakes, small species).

Mexican kingsnake: What temperature does it need?

Daytime 24–27 °C, basking spot 29–31 °C, at night 18–20 °C.

Mexican kingsnake: Does it need UVB lighting?

UVB: UVB not essential; weak UVB optional.

Mexican kingsnake: How long do they live?

Life expectancy: 15+ years.

Mexican kingsnake: Is it suitable for beginners?

Rather not – it is considered an intermediate species (difficulty: Intermediate).

Climate

Daytime temperature
24–27 °C
Night temperature
18–20 °C
Basking spot
29–31 °C
Humidity
50–60 %
UVB
UVB not essential; weak UVB optional

Enclosure

Minimum size
from 100×50×50 cm (minimum size according to the 1997 expert report, kingsnakes, small species)
Substrate
Aspen shavings or sani-chips they can dig in; plenty of hides (they are shy)

Feeding

Food
Rodents (mice)
Feeding interval
adults every 7 days, juveniles every 3–5 days

Key facts

Adult size
approx. 70–90 cm (around 80 cm; rarely up to ~1 m)
Life expectancy
15+ years
Origin
North-eastern Mexico (San Luis Potosí), rocky montane and semi-arid habitats
Protection status
Not listed under CITES; protected in Mexico (NOM-059) – look for legal captive breeding and proof of origin
Brumation
Brumation is recommended: several weeks at about 8–13 °C (a montane climate, important for breeding)
Cohabitation
Keep them singly (snake-eating and ophiophagous – a risk of cannibalism). Only for supervised, controlled breeding

Notes

Also the "San Luis Potosí kingsnake". A rather small, shy species with plenty of hides. Note: some online sources (Wikipedia for example) wrongly give 140–200 cm – the consensus of reputable care sheets is about 80 cm; corrected here.

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Related species

All species in the care wiki →

What you need to start

To keep Mexican kingsnake (Lampropeltis mexicana) you typically need: a suitable enclosure (from 100×50×50 cm (minimum size according to the 1997 expert report, kingsnakes, small species)), substrate (Aspen shavings or sani-chips they can dig in; plenty of hides (they are shy)), a heat source with a thermostat, UVB lighting, thermometer and hygrometer, a water dish and hides. You will find equipment in the Reptoria marketplace.

The complete, interactive care database is in the Reptoria app.

Last updated: 9 October 2026 · Editor: Reptoria editorial team · Sources include: https://de.wikipedia.org/wiki/Mexikanische_K%C3%B6nigsnatter, https://reptile-database.reptarium.cz/species?genus=Lampropeltis&species=mexicana

All values are non-binding guidance and do not replace expert advice. Research thoroughly from several sources before acquiring and keeping an animal, and observe the applicable law (species and animal protection in particular).