Mexican Black Kingsnake Care

What is a Mexican Black Kingsnake?

A Mexican Black Kingsnake is a beginner-friendly snake from Sonoran Desert of northwestern Mexico. Adults reach 3–4.5 ft (36–54 in; hatchlings 9–12 in; males and females similar in adult size; rare individuals approaching 5 ft reported) and can live 20–25 years in captivity — a long-term commitment. The Mexican black kingsnake is the all-black kingsnake of the Sonoran Desert — striking in appearance, manageable in size, and beginner-friendly in care, but with important overheating risk from its dark coloration and a hard-wired ophiophagous instinct that makes solitary housing non-negotiable.

What size enclosure does a Mexican Black Kingsnake need?

The minimum enclosure for an adult Mexican Black Kingsnake is 4×2×2 ft (48×24×24 in); secure escape-proof lid essential. Provide deep burrowing substrate (4+ in aspen or organic topsoil mix) and at least two hides — this species is more secretive than California kings and will burrow regularly.. Bigger is always better — Mexican Black Kingsnakes benefit from extra space to thermoregulate and express natural behaviours.

What you need:

1. Secure enclosure with tight lid — snakes are escape artists; latches or locks required.
2. Thermostat-controlled heat source — under-tank mat, radiant heat panel, or ceramic heat emitter.
3. Two hides minimum — one on the warm side, one on the cool side (security reduces stress).
4. Water bowl — large enough to soak in; changed frequently.
5. Appropriate substrate — aspen, coconut fiber, or bioactive blend; adequate depth to burrow.

What temperature does a Mexican Black Kingsnake need?

Mexican Black Kingsnakes need a thermal gradient: warm side 88–92°F, cool side 72–78°F. Use an under-tank heat mat, ceramic heat emitter, or radiant heat panel — all on a thermostat. Measure with a digital thermometer, not the stick-on strip gauges. Temperatures can drop to 68–74°F at night.

Do Mexican Black Kingsnakes need UVB?

Mexican Black Kingsnakes need low UVB — target UVI 1.0–2.0. A T5 HO 5–6% tube (e.g., Arcadia ShadeDweller) is recommended over supplementation alone. Use the UVB Calculator above to find the correct bulb and mounting height. Replace bulbs every 12 months regardless of whether they still emit visible light.

What humidity does a Mexican Black Kingsnake need?

Maintain humidity at 40–60%. Moderate humidity suits most commonly available substrates. Maintain a moist hide in one corner to support proper shedding. A digital hygrometer is essential.

What do Mexican Black Kingsnakes eat?

Mexican Black Kingsnakes are carnivores that eat whole prey — primarily mice and rats. Appropriately-sized frozen-thawed whole prey (mice; small rats for larger adults); prey approximately 10% of snake's body weight. Hatchlings every 5–7 days; adults every 10–14 days. Offer with tongs — feeding response is strong. CRITICAL: ophiophagous (wild diet includes other snakes and lizards) — never house with any other reptile. Variety: mice, rats, hamsters, gerbils, Reptilinks. Always offer prey frozen-thawed. Feed juveniles more frequently than adults; established adults can go weeks between meals without issue.

1. Whole prey — appropriately sized mice, rats, or other whole prey items.
2. Frozen-thawed preferred — never feed live prey; live prey can injure your Mexican Black Kingsnake.
3. Feeding frequency — juveniles every 5–7 days; adults every 1–4 weeks depending on size.
4. No supplementation needed — whole prey provides complete nutrition; no dusting required.

Can you house Mexican Black Kingsnakes together?

Solitary — house individually. Mexican black kingsnakes are ophiophagous and will consume any enclosure-mate, including conspecifics of any size. No exceptions outside brief supervised breeding. Start with brief, calm handling sessions (5–10 minutes) and gradually increase as your Mexican Black Kingsnake becomes accustomed to you. Wash hands before and after every handling session.

Are Mexican Black Kingsnakes good for beginners?

Yes — Mexican Black Kingsnakes are an excellent first reptile. Animals cost 100–200 (standard all-black captive-bred); albino or other morphs are rare and command 300–600+ depending on morph/locality. The main ongoing costs are frozen prey items, UVB bulb replacements (if used), and occasional vet visits.