Kukulcania arizonica
Black Hole Spider: Advanced Care Guide
Keeper Snapshot: A hardy crevice-web spider that likes bark cracks, tubes, and dry shelter.
Group: Spiders & Other InvertsDifficulty: Spice 2: BeginnerSetup: Crevice/web spiderHandling: 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 | 70-85°F |
|---|---|
| Humidity | Low-Moderate ambient (45-60%), well ventilated; dry substrate, occasional light mist, small dish |
| Setup Type | Crevice/web spider |
| Substrate | Dry substrate + vertical bark/tube hide |
| Feeding | Small 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
- vertical bark setup for display
Warnings First
- Secretive
- Fast when disturbed
- Do not destroy web retreat
- A dense funnel retreat traps still air. Vent low on two opposite walls so air moves past the retreat instead of stopping at the silk.
Simple Care
- Give a vertical crevice or tube.
- Vents low on two opposite walls so air moves past the web retreat rather than stalling on it.
- Mist lightly only as needed.
- Small water dish or cap with grit in it so spiderlings cannot drown.
- Expect it to hide in webbing.
Advanced Keeper Notes
Enclosure & Microclimate
- This spider benefits from a fixed retreat where it can build a sheet/funnel-like web.
- Do not constantly clean out webbing; that is the animal’s home and hunting structure.
- Since you are leaving the webbing in place, the ventilation has to work around it. A dense funnel retreat is effectively a baffle: air entering through a lid vent stops at the silk and never reaches the spider inside. Put vents low on two opposite walls so air moves horizontally past the retreat. On a dry-leaning crevice species that is what keeps the inside of the funnel from holding damp air after a mist.
- On a dry species the ventilation and humidity relationship is one-directional: more airflow is always better. Ambient sits at 45 to 60% by itself, and light misting is for drinking rather than for raising humidity.
- Judge by touching the silk and substrate rather than by a gauge. Both should read dry within a few hours of a light mist. Webbing that stays damp means the enclosure needs more airflow.
- Keep a small water dish or cap packed with grit so the waterline sits below the rim, so you are not relying on misting alone and spiderlings cannot drown.
- Mist near the mouth of the retreat rather than into it. The spider gets drinking droplets and the interior of the funnel stays dry, which is what a crevice-dwelling desert species actually wants.
Feeding, Growth & Maintenance
- Keep conditions dry-to-moderate with occasional drinking moisture.
- A vertical bark setup with a cork crevice is ideal for making a secretive species look intentional.
- Molting: a premolt spider stops eating, dulls in color, and sits tight in its web retreat. That's normal. Remove uneaten prey, don't disturb it, and wait a few days after the molt (until the new exoskeleton hardens) before feeding.
Possible Origin / Range
- Likely native range: Southwestern United States and northern Mexico crevice or web habitats.
- Habitat translation: Dry-to-moderate crevice setup with web anchor points and minimal disturbance.
Advanced Keeper Details
- Provide a fixed retreat and feed at the web entrance; avoid destroying the tube web during cleaning.
- Moisture should be indirect; droplets on webbing can cause retreat abandonment.