Phormingochilus sp. “Akcaya”

Phormingochilus sp. “Akcaya” calls the lush rainforests of Borneo in Indonesia home. These tropical forests are dripping—literally!—with humidity and alive with dense foliage, towering trees, and the odd surprise downpour. You’ll find them snug in arboreal retreats high above the forest floor, tucked in hollowed tree cavities or beneath overlapping leaves. The temperature stays balmy year-round, often hovering around the mid-20s to low-30s Celsius, accompanied by the kind of humidity that gives hair (and tarantula fuzz) a real bounce. Their environment is always dynamic, with plenty of rainfall and steady warmth, so it’s important to replicate that vibe in captivity as best as you can.

Once fully grown, this species reaches around 12–15 cm diagonal leg span—impressive for an arboreal! Females tend toward the larger side and are noticeably bulkier, whereas males are usually a little smaller and leggier. Growth is steady (you won’t need to knit it tiny jumpers forever). Both sexes are striking, but females win in the longevity department, hanging around for years past maturity when well cared for.

Phormingochilus sp. “Akcaya” is a true arboreal, making its living above ground—think James Bond with more legs and less martini. In captivity, they favour the vertical world, choosing to construct tubular silken retreats among bark, cork tubes, or upright décor. Expect them to spend most of their time off the ground, occasionally poking out to see if it’s tea time (that is, cricket time). They're quick and will dart for cover at the slightest sign of disturbance, using their exquisite webbing to reinforce their hideouts and mark their territory.

The ladies put the gentlemen to shame here—female Phormingochilus sp. “Akcaya” can live up to 12 years or even more if you spoil them rotten and dodge the classic keeper errors. Males, on the other hand, tend to be short-lived—most only make it to 3–4 years tops, maturing quickly and then, as is tarantula tradition, making a hasty exit from this world. So, if you’re after a long-term hairy companion, cross your fingers for a female at sling stage.

Growth is medium—speedier than some classic pet tarantulas but nothing that will have you blinking and missing a moult. Good feeding and a slight nudge in temperature help them along, but overdoing it can cause more trouble than it’s worth. You might be surprised at how quickly slings outgrow their first web tunnels, but you’ll never need to change enclosures every month.

Phormingochilus sp. “Akcaya” has a reputation as a skittish but not overtly defensive tarantula. Forget hissing fits and mad attacks—this one prefers a quick bolt into its silk retreat at the first sign of movement. They’re lightning fast (think ninja, but fluffier), prone to teleporting when startled, so make sure you always plan any enclosure work in advance. While bites are extremely rare, it’s wise to respect their speed and avoid unnecessary stress. Not exactly social butterflies…but fascinating to observe when they feel safe.

Aim for a cosy 23–26°C—basically, pretend your spider’s on a permanent tropical holiday. Temperatures can dip as low as 20°C at night without tears being shed, but avoid letting things drop below 18°C for long. On the hot side, anything up to 28°C is usually safe as long as you maintain humidity. Use a quality digital thermometer, and heat pads on the side (never underneath) if your house runs cold. Always, always monitor the enclosure—no tarantula wants to turn into a crispy critter, and sudden temperature swings can cause stress or even moult issues.

Keep the humidity in the 70–80% range—think of it as creating the tropics in miniature. Don’t go full monsoon; good cross-ventilation stops things going swampy quite so fast. Daily misting is generally best avoided—give one side of the enclosure a light spritz every few days, aiming for slightly damp (not soaked) substrate. Always provide a shallow water dish: even though you may never actually see your Akcaya drink, it stops dehydration and helps maintain ambient humidity. Check for condensation or mould and increase ventilation if needed—spiders don’t need a greenhouse, just a hint of rainforest.

Visibility is the classic arboreal lottery—sometimes you’ll get a full display, other times just a hairy foot or the odd twitch from deep inside a web tunnel. They’re generally more visible in the evening or just after lights-out, when hunting instincts kick in. During moults or when disturbed, they’ll vanish into the safe dark until convinced the coast is clear. Display value goes up once settled; a confident Akcaya can be a truly spectacular centrepiece, especially when redecorating its webs or hunting in style.

Webbing is where Phormingochilus sp. “Akcaya” truly shines. They construct elegant silk tunnels and hammock-like retreats high up in their enclosures, blending web and substrate artfully with whatever décor is available. Expect the enclosure to change as the spider grows and refines its lair—whether it’s spiralling silken passageways or covering their entire corner in a fluffy fort, they’re natural decorators. The webbing is both a defensive safe space and a hunting lounge, so plenty of anchor points make all the difference.

These spiders are enthusiastic eaters, pouncing on anything that twitches with gusto. Slings take to pre-killed or very small live prey—fruit flies, pre-killed pinhead crickets, or tiny roaches work well twice a week. Juveniles can handle bigger fare—small crickets, mealworm chunks or micro-locusts—about once a week, and adults are satisfied with one or two adult crickets or similar-sized prey every 7–10 days. Avoid feeding during pre-moult: if your Akcaya is sulking or barricaded away, don’t shove food in—it’s probably about to moult. Remove any uneaten prey promptly to prevent stress or damage to a fragile spider. Overfeeding can lead to overly plump tarantulas and accidents at moulting, so go for lean, mean feeding rather than feasts fit for a banquet.

Get yourself a tall, well-ventilated arboreal enclosure (20 x 20 x 35+ cm for adults). Glass or acrylic are fine as long as there’s secure front or side access—top-opening lids plus an arboreal ninja can equal panicked sprints. Use a few inches of moisture-retentive substrate (coco fibre, peat, or a mix) at the base to help keep humidity stable. Add plenty of vertical décor—cork bark tubes, branches, sturdy fake or live plants for anchor points. A snug retreat at mid- to high-level is a must. Provide a shallow water dish on the floor, checked and cleaned regularly. Ensure ventilation is generous near the top and lower sides to balance humidity and airflow. Watch for mould or stale air—tweak as needed. Juveniles can thrive in smaller, well-ventilated tubs with similar principles until they’re large enough to move up.

Not a spider for the absolute beginner, but a real treat for those who’ve kept arboreal or speedy species before. Quick movement and sensitivity to environmental changes mean this is best tackled by intermediate to advanced keepers who already know not to leave the enclosure open with the dog snuffling nearby. If you have a steady hand and respect for arboreal quirks, you’ll love this species!

Phormingochilus sp. “Akcaya” is a hidden gem for hobbyists who want a blend of beauty, speed, and architectural marvels. Their arboreal lifestyle and dramatic webbing offer a real spectacle for those patient enough to wait for evening activity. While their quick movements and humidity needs mean they aren’t for the faint-hearted or slapdash keeper, they reward attention with fascinating behaviours. Not a pet for handling—unless you enjoy a heart attack—but ideal for the keeper who loves to observe, tinker with setups, and appreciate the unique charm of rare Southeast Asian arboreals. Set them up right, respect their boundaries, and you’ll have years of 8-legged wonder.