Corn Snakecare guide

• They escape. A corn will find a gap you did not know was there, and a hatchling fits through a vivarium vent. Escape is the commonest way corn snakes die in captivity.
• They get fat. They eat so reliably that you can end up feeding an adult like a hatchling for life.
• They are active in the evening, climb, and are often out. More rewarding to watch than a royal, and more likely to be out when the door is open.

Lifetime cost, vets, freezer space and hygiene: handbook, Before you buy.

bask applies REPTA's Deleterious Gene Policy in full. How the three groups work is in the handbook, Morphs and welfare. These are the corn snake rows.

No corn snake morph is on REPTA's prohibited list. One carries a welfare note.

If you plan to breed, ask whether either parent is a known carrier; two hets paired produce affected hatchlings. Scaleless corns are allowed and carry no note; they need care with rough décor and heat, and a seller should say so.

REPTA reviews its list every six months and bask follows each change. Checked against the list published on 6 September 2026.

The general seller questions, health checks and quarantine rules are in the handbook, Buying, collection, quarantine. For a corn snake, push harder on these.

• Whether it has ever regurgitated, and how often. Repeated regurgitation is the first sign of cryptosporidiosis, which spreads to every snake you own.
• Body condition rather than weight. A heavy adult corn is not a healthy one.
• What it is housed in now. A hatchling from a tub needs your vents meshed from day one.

Check the animal

No mid-body swelling, no retained eye caps, a straight spine along the whole length, purposeful movement with good grip.

UK law

No licence; not on the Dangerous Wild Animals schedule and not CITES-listed. Corns are not native to Britain; releasing one is an offence and it would not survive a winter. Duty of care, business licensing and the release offence: handbook, UK law.

As long as the snake, and sealed

A wooden vivarium with a lock. Check every seam, the runner gap, and the cable entry; corns push at the top of the glass, so the runners must grip. A branch or cork tube up the back wall gets used every night.

Enclosure types, ventilation, locks: handbook, The enclosure.

A few degrees cooler than a royal

Corns come from the woodland edge and farmland of the eastern United States. Same gradient, lower numbers.

A heat mat under a third of a hatchling tub on a mat stat is enough to start. For the adult viv, a deep heat projector or ceramic on a pulse stat, guarded, or a halogen on a dimming stat; corns will bask under it.

UVB

Corns are out by day more than royals: Ferguson Zone 2. A 6 % T5 tube over the warm third for a UV Index of 1-2 at the basking spot, 12 hours on a timer.

Thermostats, probe placement, tube replacement: handbook, Heat, light and safety.

40-60 %, deep aspen, a branch

Corns want it drier than a royal. Dry substrate and a bowl at the cool end hold 40-60 % on their own; over 65 % sustained, aspen moulds and scale rot follows. Put damp moss in one hide when the eyes go blue.

Corns burrow. Give 5-8 cm of aspen, which holds a tunnel, stays dry and is cheap; lignocel or a topsoil and coir mix if you want a natural look. Never pine, cedar or calci-sand.

Two identical snug hides, clutter across the floor, a climbing route up the back, and a heavy bowl at the cool end that the snake cannot tip into the aspen.

Humidity: handbook, Humidity. Substrate compared: handbook, Substrate. Hides and water: handbook, Hides, cover and water.

Cloth bag in a rigid insulated box at 20-26 °C, straight into the viv you ran for 48 hours, lock checked. No handling for 7 days. First meal after five to seven days, the same prey size the seller used. Check the lock and every vent each time you leave the room.

Running the enclosure empty first, quarantine and the first fortnight for any reptile: handbook, The first weeks.

Active, fast, and fine with it

• Wait 48 hours after a meal. Not in shed.
• A corn travels through your hands rather than sitting in them. Keep both hands moving under it, away from doors and gaps behind furniture.
• Hatchlings rattle their tail, strike and musk. Short calm sessions a few times a week settle them within a couple of months.

Photo: Ruben Christen on Unsplash

Frozen-thawed mice, less often than you think

Prey no wider than the snake, about 10-15 % of body weight. Corns rarely refuse, so the discipline is in the interval.

An adult on a weekly feed is obese within two years: round in cross-section, folds when it coils, a fat line along the belly. Weigh monthly and stretch the interval once it has stopped growing in length. Feed in the vivarium with tongs and leave it for 48 hours. Some adults eat less for a few weeks in winter; that is normal and short.

Thawing, tongs, live prey: handbook, Food you store or keep alive.

One piece, every four to eight weeks

Eyes go blue for a few days, clear, and the shed follows within a week. Damp moss in one hide when the eyes cloud and it comes off whole, eye caps and tail tip included. Fragments mean too dry; add the humid hide earlier next time.

Treating stuck shed: handbook, Health.

What corns actually get

Respiratory infection, mites, mouth rot, burns and the same-day signs: handbook, Health. Finding a vet: handbook, Vets and insurance.