Florida Cottonmouth

🔤 Taxonomy

Agkistrodon conanti is the Florida cottonmouth, formerly A. piscivorus conanti. The split from the northern cottonmouth follows molecular work, with admixture near the contact zone. Preserve locality documentation: appearance alone cannot reliably sort animals from that zone.

📌 Description

A heavy-bodied, semi-aquatic pit viper; the Florida Museum gives a typical adult length of 76-122 cm, with substantially larger exceptions. Juvenile bands become less distinct with age. Its defensive open-mouth display is not an invitation to approach. Provide both accessible freshwater and enough dry land for the entire animal to rest and move.

The active-season values below are provisional management starting points, not demonstrated physiological optima or safety limits. Enclosure dimensions are practical recommendations for one adult; increase them for a larger individual. Confirm the plan with an experienced reptile veterinarian and retain locality records.

📋 Quick reference

☠️ Venom

Bites can cause significant pain, swelling, tissue injury and clotting abnormalities; systemic illness is possible. US antivenoms such as ANAVIP have an FDA indication for North American pit-viper envenomation, but hospital clinicians decide treatment. Their US availability and indication do not guarantee immediate supply in Europe. Severity varies; a small wound does not rule out serious or delayed envenoming.

Treat every bite as an emergency, including an apparently dry bite. Move away, call emergency services, keep the person still, remove rings and support the limb without compression. Do not cut, suck, ice or tourniquet the wound, and do not catch the snake. Follow poison-centre instructions. Agree a receiving hospital and antivenom access before acquisition; treatment belongs in hospital.

🌍 Distribution

Native to the southeastern United States, centred on peninsular Florida, with northern contact-zone populations toward southern Georgia and southeastern Alabama. Florida’s panhandle contains admixture with A. piscivorus. Marshes, streams and wet woodland are familiar habitats, but individuals also travel on land; nearshore occurrence does not mean that seawater is suitable drinking water.

🌡 Climate across the native range

Monthly outdoor normals for 1991–2020 illustrate seasonal and regional differences, not enclosure settings. These approximate landscape coordinates are not exact snake records.

Weather data by Open-Meteo.com · CC BY 4.0 · Monthly normals calculated by Herpeton Academy from daily archive values.

⚖️ Legal status

No CITES or specific EU wildlife-trade annex listing was found. Florida requires a permit to possess venomous reptiles, with experience and facility requirements; being native is not an exemption. Other US states and the destination country have separate capture, transport and possession rules.

The Bern Convention is not a relevant native-range protection framework for this American species; this does not remove national wildlife or dangerous-animal restrictions.

Legal review: 17 September 2026. National capture, possession, registration, breeding, sale and transport rules may be stricter. Verify permits before transfer and keep invoices, breeder identity, parentage and import records. Trade status does not itself authorize keeping a venomous snake.

🤌 Husbandry

Keep Agkistrodon conanti individually in a locked enclosure within an access-controlled venomous-reptile room. Secondary containment and a lockable shift compartment should permit water changes and cleaning only after the animal has been isolated and visually accounted for. Free-handling is unacceptable. Prepare written bite and escape plans, trained backup cover and a veterinary arrangement before acquisition.

Quarantine for at least 90 days as a working minimum, longer when the veterinarian advises. Use separate tools and a simple enclosure; record feeding, sheds, faeces and body condition. Arrange parasite screening for uncertain-origin animals or abnormal stools. Weigh only through an established protected-contact procedure.

💡 Lighting

Provide about 12-14 hours of visible light during the active season, with darkness at night and shaded retreats. A species-specific UVB requirement has not been demonstrated. If low-level UVB is used, measure exposure and retain complete shade; do not infer lamp strength from habitat photographs. Guard lamps and wiring against contact.

🌡 Heating and temperature

Begin with air at 24-28°C, a local basking surface at 30-32°C, a cool retreat at 21-24°C and night air at 19-23°C. These are cautious working bands, not tolerance limits. Measure air, surface and cool-hide temperatures separately. Thermostat-control heating; check the room during summer because a thermostat cannot cool hot air.

Seasonal cooling requires a documented, locality-specific plan for healthy, established adults. Do not cool new arrivals, thin, sick or gravid animals, or copy an adult breeding cycle onto juveniles. Outdoor monthly normals are not brumation instructions.

Southern Florida and northern contact-zone animals do not experience identical winters. Do not infer a mandatory cold rest from the northern cottonmouth guide. Check air over both land and water, and ensure a large basin does not eliminate the cool dry refuge.

💧 Humidity and water

Provide a stable freshwater basin large enough for the snake to immerse voluntarily, with broad, easy exits and no inaccessible gaps underneath. Keep sufficient dry land for full extension, separate warm and cool hides, and a completely dry resting surface. Swimming or soaking must remain a choice; never force the animal into water.

Drain or remove the basin only after isolating the snake in a locked shift compartment. Fit escape-proof drains and guarded equipment. Replace fouled water promptly, inspect daily and clean the basin routinely; filtration does not replace hygiene. Maintain ventilated air around 50-70% relative humidity rather than soaking the entire substrate. Repeated immersion may indicate mites or unsuitable land temperatures and needs assessment.

🌿 Enclosure and decoration

Use at least the practical 160 × 80 × 70 cm layout in the table and allow the snake to stretch fully. Check door gaps, vents and cable holes against the smallest animal housed. Fix rocks directly to the enclosure base so excavation cannot undermine them; retain clear sightlines to shift doors. Avoid sharp gravel, aromatic wood and unstable piles. Remove waste after securing the snake.

Reserve most of the usable floor for land, with a dry route long enough for the snake to extend fully. Use about 5-8 cm of soil-and-sand mix beneath leaf litter on the land section, isolated from basin overflow. Fit a removable water basin and inspect beneath it only after secure separation. Paper-lined land is easier to monitor in quarantine.

🐁 Feeding

Wild cottonmouths eat many vertebrates and occasionally carrion. For a managed collection, use a documented diet of appropriately sized thawed whole rodents, with other whole prey only under a reviewed nutrition plan. Do not use wild-caught fish or assume all fish are nutritionally interchangeable. Juveniles generally need smaller meals about every 7-10 days.

The table gives an initial adult feeding interval of 14-21 days; adjust portions and timing to weight trend and condition. Deliver food through the collection’s protected feeding system. Avoid live rodents and substrate-coated food; dehydration, low temperatures and oversized meals increase regurgitation and impaction concerns. Whole prey normally needs no routine calcium or vitamin dusting. Do not improvise supplementation or force-feeding.

🥚 Breeding

The Florida Museum reports live birth, commonly 1-20 young, usually in late summer or autumn in Florida. Local timing is not a universal breeding schedule. A professionally sexed, mature female needs quiet solitary housing with secure land and easy water exits. Newborn containment must exclude drain and ventilation gaps before pairing.

Breeding adds exposure risk. Prepare separate, escape-proof neonatal housing before pairing, avoid permanent cohabitation, and retain parentage, dates, meals and transfer records. Only breed when lawful placements and competent staff are available.

🩺 Common problems

• Overheating: repeated escape attempts or unusual exposed resting require immediate measurement of the cool retreat.
• Dysecdysis and dehydration: review drinking access and the moist refuge; repeated problems need veterinary assessment.
• Respiratory infection or stomatitis: wheezing, bubbles or oral discharge require prompt professional care.
• Dermatitis, impaction, obesity and parasites: dirty wet bedding, substrate ingestion, excessive feeding or persistent weight loss need correction and diagnosis. Do not use automatic deworming or home restraint.

📌 Conclusion

A Florida cottonmouth enclosure succeeds only when dirty water can be replaced safely and the snake can choose dry land. If servicing a pool requires reaching past an unconfined animal, redesign it before acquisition.

📚 Sources and further reading

ReptiFiles was checked first on 17 September 2026; no species-specific guide was found. Numerical recommendations are separated from directly reported breeding outcomes. Historical care reports are not current medical instructions.

• Reptile Database
• GBIF
• Agkistrodon venom variation (2024)
• Agkistrodon venom and immunochemistry
• Agkistrodon venomics
• Florida Museum: Florida cottonmouth
• FDA: ANAVIP
• FWC: venomous reptile permits
• ReptiFiles
• WHO: snakebite first aid
• CITES Appendices — 5 March 2026
• EU Regulation 2026/1383
• DAERA: venomous-snake keeping guidance
• Baines et al. (2016): UV-Tool