Cranwell’s Horned Frog — Ceratophrys cranwelli: Habitat and Care

Ceratophrys cranwelli is Cranwell’s horned frog, one of the animals sold as a Pac-Man frog. That broad trade name also covers other Ceratophrys and hybrids. A bright colour morph or “fantasy” label does not establish species identity; ask the breeder for the actual parentage and retain it with the animal’s records.

The accepted species is native to the Chaco region of South America, including parts of Argentina, Bolivia, Paraguay and Brazil. Seasonal landscapes contain terrestrial burrowing opportunities and temporary breeding waters. A dry season in nature does not make a hot sandy display suitable for routine captive care. Adults are broad-bodied sit-and-wait predators, usually around 8–13 cm, with larger females requiring particularly generous usable floor space.

Plan roughly 60 × 45 cm of floor space for a single adult, increasing it for a very large individual. This is a practical home-enclosure recommendation rather than a statutory or experimentally established minimum. Height must accommodate a deep substrate layer and safely mounted equipment, but tall branches cannot replace floor area.

Keep the frog alone. Biting and cannibalism are genuine risks, not problems solved by feeding two animals first. Leave an open feeding zone and several choices of burial position away from the warmest area. Secure the lid and avoid heavy ornaments that could shift when the frog digs underneath. Design access so you can inspect and clean without routinely handling the animal.

Begin around 23–26°C by day with a modest fall towards 21–23°C at night, leaving a cooler part of the floor. Species-labelled captive references differ; moderate stable maintenance is distinct from pushing the warmest published value. Measure beside the burrow and verify any heat source with a thermostat. Do not put uncontrolled heat beneath the substrate where digging might bring the frog closer to it.

Relative humidity around 60–80% is a practical starting guide, with air exchange and consistently moist lower substrate. A high air reading cannot compensate for a dry burrow, and misting cannot correct waterlogged soil. Provide a stable shallow basin that the frog can leave without climbing a vertical edge, with its head clear while resting. Use suitable conditioned water and clean the basin daily or immediately when fouled.

Offer a regular light–dark cycle and shaded resting choices. The frog must be able to bury away from light. If offering UVB, use a measured low-exposure gradient with complete cover; do not assume the same exposure is appropriate for a normally pigmented animal and an albino morph. Lamp distance, mesh and basking position change what reaches the skin.

Published captive practices vary, so coordinate UVB and dietary D3 with an amphibian-care professional rather than using a generic high-output reptile bulb. Avoid coloured lights left on all night. Low apparent daytime activity is not a reason to increase temperature or repeatedly dig the frog up.

Seasonal rains and temporary water are associated with reproduction, and the eggs and tadpoles have aquatic requirements quite unlike the adult burrowing enclosure. Do not deliberately dry a frog into dormancy or copy hormone-based laboratory breeding procedures into routine home care.

Larvae are active predators and can cannibalise one another. Planned breeding needs suitable space, separation or carefully managed density, larval feeding, water-quality control and homes for the resulting frogs. At metamorphosis, provide very easy exits and moist terrestrial substrate. Juvenile feeding size and housing must then be reassessed; an adult’s deep basin or adult prey is not automatically safe for a froglet.

Inspect water, temperature and the frog’s condition daily without repeatedly excavating it. Remove faeces promptly, check under the water dish and replace contaminated substrate. In a bioactive enclosure, soil still needs inspection and spot cleaning; clean-up organisms do not neutralise all waste or prove parasite freedom.

For reduced appetite, check actual soil temperature, moisture, the last meal, body condition and recent changes. Unexplained weight loss, persistent bloating, injury or abnormal skin needs an amphibian vet. Do not force-feed or warm the whole enclosure aggressively on the assumption that every buried frog is merely dormant.

Use the Naturalistic Terrarium World for material roles and maintenance principles, then prioritise the wide moist floor. The Tropical Leaf-Litter Vivarium guide can help with plant placement and accessible drainage, but retain open burial and feeding areas rather than densely filling every centimetre. The Dry Woodland and Scrub design is not suitable unchanged for this species.

Do not buy a decorative pod assortment simply to populate an empty corner. Large smooth shelter and restrained leaves are more useful than sharp shells, aromatic bark, tight tubes or small holes. BBA materials are optional components after safety checks, not a species-certified enclosure kit or a substitute for appropriate live food.

Choose documented captive-bred animals from a source that can explain their identity, feeding and rearing history. Keep new arrivals in a separate, easily inspected quarantine enclosure with dedicated tools; an amphibian vet can advise testing and release from quarantine. Never release frogs or their water outdoors. Check current Species+ listings and APHA requirements before any import or export; captive breeding does not automatically remove paperwork requirements. BBA supplies habitat materials, not the frogs described here.

Ask specifically whether the frog is pure C. cranwelli or a documented hybrid. Avoid routine handling and never keep another frog as company. Use a clean container for necessary moves; biting can injure both the keeper and the animal if a startled hand pulls away.