Ceratogyrus brachycephalus

Ceratogyrus brachycephalus, also known as the Greater Horned Baboon, is native to the arid regions of Southern Africa, particularly Zimbabwe and parts of Mozambique. These spiders inhabit grassy savannahs and scrublands, where the climate can be quite warm and dry, with occasional bursts of rain. They are ground dwellers, and their natural habitat consists of sandy or loose soils ideal for burrowing. Rain or shine, these tarantulas find safety in deep burrows, escaping both harsh midday heat and potential predators. Understanding their wild environment is key to keeping them content in captivity—so think sun-baked soil rather than the lush jungle when planning their setup.

Greater Horned Baboons reach a mature diagonal leg span of 12–15 cm, with females generally being larger and bulkier than their male counterparts. Males are more slender and leggier, as is typical with many Old World species, and generally mature a little earlier. Despite their impressive horn and attitude, they’re not the largest tarantulas out there, but what they lack in sheer size they make up for in personality. Given a steady diet and the right environment, you’ll see your little sling transform into a confident, horned beast over the years.

C. brachycephalus is a classic fossorial species, which means it spends most of its time underground. In captivity, they’re ever the little tunnellers, enthusiastically digging elaborate burrows if given enough substrate to satisfy their ambitions. Their fossorial nature means you’ll usually see just the tips of their legs sticking out of a burrow entrance, keeping an eye out for passing snacks. Occasionally, especially at night or after a big feed, you’ll catch more of them as they do a bit of housekeeping or rearrange their webbing. If you fancy a spider that genuinely enjoys engineering its own home, this is the species for you.

Females of this species are in it for the long haul, often living 12–15 years in captivity if given proper care (and not too many surprises). Males, however, have a rockstar lifestyle—maturing quickly and usually bowing out after 3–4 years (often shortly after their ultimate moults). If you’re after a long-term eight-legged housemate, a female C. brachycephalus will be with you for many fascinating years.

C. brachycephalus grows at a moderate rate—certainly faster than their New World cousins, but nowhere near as turbocharged as some Asian species. With regular meals and warm temperatures, slings quickly progress to juveniles, showing that spectacular horn surprisingly early. Growth may slow as they approach adulthood, especially for females. Feeding frequency and enclosure conditions (temperature especially) will have a noticeable impact, so keep things steady and you’ll see consistent growth.

This isn’t your beginner’s cuddle-fluff—C. brachycephalus has a reputation for being defensive and direct. While they aren’t out to get you, they’re not shy about showing threat postures or dashing into their burrows with the grace of a startled squirrel. Fast and flighty, they don’t hesitate to let you know when your presence is uninvited. Most keepers report that routine tasks lead to lots of posturing and drumming, but actual bites are rare with sensible husbandry. Give them respect and space, and everyone will get on famously.

Aim to keep your Ceratogyrus brachycephalus at a cosy 22–25°C. They can tolerate the odd dip a little lower at night (down to around 19°C), but prolonged cold or heat above 28°C isn’t ideal. In the UK, an oil-filled heater or low-watt heat mat attached to the outside of the enclosure (never underneath) will do the job for your average spider room. Always use a thermostat and digital thermometer—this species may hail from hot Africa, but they still like stability. Avoid drastic swings, which can stress them out and potentially slow their growth.

Ceratogyrus brachycephalus prefers a humidity of 50–65% RH—nothing too sweltering or swampy. Overly wet conditions are far more dangerous than a brief dry spell. Use a deep, dry substrate and occasionally pour a small amount of water down one side to keep the lower layers mildly damp, mimicking the natural burrow environment. A sturdy water dish should always be available—watch for the classic water dish excavation! Good cross-ventilation is essential to prevent stagnant air and mould, so don’t skimp on the air holes.

Let’s be honest: you’ll be seeing more burrow than spider for much of the time. However, if you love the anticipation of a rare appearance—or enjoy the engineering marvels of burrow creation—this is a rewarding species. They sometimes sit boldly at their entrance in hunt mode, especially at feeding time. When they do emerge, that glorious horn makes for a stunning display. Observant keepers may glimpse interesting hunting and webbing behaviours during the twilight hours.

While not quite the web architects of some other baboon tarantulas, C. brachycephalus is no slouch when it comes to sprucing up its burrow. Expect silk linings along tunnel walls and frequent web ‘curtains’ around the entrance, often matted together with bits of substrate. Webbing is used as both a tripwire for passing snacks and a handy way to reinforce burrows. Not the species for intricate aerial webs, but their burrow construction is routinely impressive.

C. brachycephalus isn’t picky when it comes to dinner—crickets, locusts, dubia roaches and the odd mealworm are all enthusiastically snatched. Slings thrive on small roaches or flightless fruit flies 1–2 times weekly, while juveniles can have medium crickets or small locusts every 7–10 days. Adults are content with a hearty meal every 10–14 days. This species has a solid feeding response; you’ll often see them pounce if prey gets too close to the burrow entrance. Avoid overfeeding, as a plump spider is quicker to refuse food and may be at greater risk during moults. Always remove uneaten prey after 24 hours, particularly before or during moulting.

Fossorial species like C. brachycephalus demand a deep enclosure—think at least 20–25 cm depth of substrate for an adult. Use a sturdy acrylic or glass tank with lots of ventilation. Fill with compacted topsoil, coco fibre or a peat-free, chemical-free alternative. Add a starter burrow (a sloped hole against the side) to help them settle in, and a bark or cork hide as extra security. Resist the urge to decorate with plants—they’ll be excavated or buried in no time. A shallow water dish is a must, securely positioned so it’s not tipped by burrow renovations. This isn’t a spider for a bare-bones tub; give them space to dig and they’ll reward you with top-tier burrowing action.

C. brachycephalus is best suited for intermediate or advanced keepers due to its speed, defensiveness, and Old World attitude. While not impossible for a dedicated beginner, it’s a species that rewards experience—especially with rehouses or routine maintenance. If you’re comfortable managing a fast fossorial with pincers for days (and a bit of a Napoleon complex), you’ll be just fine. For brand new hobbyists, a more forgiving starter species is recommended to cut your teeth.

Ceratogyrus brachycephalus is a true character—equal parts drama queen and tunnel engineer. With its impressive horn and no-nonsense attitude, this species provides endless fascination for those who appreciate fossorial tarantulas. Not the best choice for the show-off keeper wanting constant visibility or a hands-on experience, but ideal for spider lovers who enjoy natural behaviours and watching a spider remake its home after every meal. With respect, patience, and the right setup, this is a brilliant addition to any collection, especially for those wanting a glimpse of Africa without leaving Blighty.