Hapalopus formosus
Pumpkin Patch Tarantula: Advanced Care Guide
Keeper Snapshot: A tiny, high-contrast dwarf tarantula that needs small prey and good moisture control: adults reach only about 2.5-3.5 inches across.
Group: TarantulasDifficulty: Spice 2: BeginnerSetup: Dwarf terrestrial/fossorialHandling: Not recommended
Use This Guide Safely
- Confirm the exact animal. Match this guide to the species, locality, size, and life stage on your label. If the ID is uncertain, use the more conservative part of the range and ask before changing the setup.
- Change one thing at a time. Treat temperature and humidity as target zones, then watch posture, burrowing, drinking, feeding, and molt behavior before making another adjustment.
- Respect the handling boundary. If the guide says no handling, fast, defensive, or medically significant, plan transfers with catch cups, locked lids, and no bare hands. For serious bites, stings, or symptoms, seek emergency medical care.
Quick Snapshot
| Temperature | 72-80°F |
|---|---|
| Humidity | Moderate ambient (60-75%) with airflow; stable damp pocket, dry area, bottle-cap dish |
| Setup Type | Dwarf terrestrial/fossorial |
| Substrate | Moderately moist substrate with starter burrow |
| Feeding | Tiny prey weekly |
| Care Difficulty | Spice 2: Beginner |
| Handling | Not recommended |
Humidity zones: Very Low under 30% - Low 30-60% - Low-Moderate 40-70% - Moderate 60-80% - Moderate-High 70-85% - High 80%+ - Very High 90%+
Enclosure Format / Size Class
- Compact secure enclosure while it's a tiny sling
- Horizontal terrestrial burrow setup, juveniles through adults: a Burrow-Buddy footprint is a forever home for a dwarf this size
Warnings First
- Very small slings
- Drying out is risky
- Easy to lose during rehousing
- Keeping a tiny enclosure moist without ventilation is how these are actually lost. Small vents low on two opposite walls, and grit in the water cap so a pinhead sling cannot drown.
Simple Care
- Keep in a small secure enclosure.
- Small vents low on two opposite walls; a damp dwarf enclosure has almost no air volume to buffer it.
- Offer a tiny burrow and tiny prey.
- Bottle-cap water dish packed with grit so a very small sling cannot drown.
- Moist, not swampy.
Advanced Keeper Notes
Enclosure & Microclimate
- This is a small dwarf species that is easy to overhouse. Use a compact enclosure where prey is easy to find and moisture is easy to monitor.
- Keep moisture stable in part of the enclosure with ventilation to avoid mold.
- Getting that ventilation in the right place is the difference between stable and swampy. Put small vents low on two opposite walls, at or just above the substrate, so air crosses the floor of the cup. Venting only the lid leaves motionless damp air sitting at the bottom, which is exactly where a Hapalopus sling lives and where mold takes hold first.
- Ventilation and moisture trade against each other quickly at this scale. Keep the damp portion topped up under free-flowing vents rather than sealing the cup to hold moisture, because a small enclosure goes from correct to moldy in a matter of days.
- Judge by eye rather than by any gauge. The damp portion stays lightly moist with no free water, the dry portion reads genuinely dry, and there is no condensation on the walls. Condensation in a dwarf sling cup is an early warning, not a good sign.
- Use a bottle cap as the water dish and pack it with coarse grit so the waterline sits below the rim. Slings of this species are small enough to drown in a few millimetres of standing water, and since they are kept deliberately moist there is more standing water around than on a dry species.
- Put the water into the tiny burrow rather than misting the whole cup. That keeps the humid microclimate where the sling actually sits, preserves a genuinely dry area, and avoids swinging the entire environment every time you water.
Feeding, Growth & Maintenance
- Use pinhead prey or pre-killed feeder pieces for tiny slings. Oversized prey can stress or injure them.
- Feeding schedule: slings tiny prey 2×/week; juveniles every 5-7 days; adults weekly to every 2 weeks. Keep prey smaller than the abdomen. It's a dwarf with a big appetite and a fast grower, but don't power-feed.
- Molting: a premolt Pumpkin Patch turns sluggish, seals into its web/burrow, and stops eating for days or even weeks. Normal. Pull uneaten feeders, leave it alone, and wait 5-10 days after the molt before feeding again.
- Rehouse over a tray or catch bin. Tiny dwarf tarantulas disappear fast.
Possible Origin / Range
- Likely native range: Colombia.
- Habitat translation: Small terrestrial or fossorial setup with slightly moist lower substrate and strong ventilation.
Advanced Keeper Details
- Tiny slings are escape-prone and dry quickly; use micro prey and secure vents.
- This species webs and burrows heavily; enclosure size should let you monitor feeding without destroying retreats.
- Adult size ~2.5-3.5 in DLS: a true dwarf; a very fast grower; lifespan ~6-8 years.
- ID CONFIDENCE FLAG: the pumpkin patch in the trade is most defensibly written as Hapalopus sp. 'Colombia'. H. formosus Ausserer, 1875 is a valid described species, but the prevailing view is that the animals circulating in the hobby are not true formosus and may be closer to H. triseriatus. Two forms are sold, a 'large' or Colombia Gross form at roughly 3.5-4 in and a 'small' or Klein form at roughly 2-2.5 in, and whether they are one variable species or two is unresolved. We call it Hapalopus sp. 'Colombia' until someone confirms an ID.