How To Feed Jumping Spiders: A Comprehensive Guide To Nutritional Husbandry
Jumping spiders (Salticidae) require a diet consisting primarily of live, appropriately sized insects that match the width of their cephalothorax to ensure successful hunting and digestion. Maintaining a consistent feeding schedule—typically every three to five days depending on age and life stage—is critical for preventing metabolic bone disease and ensuring healthy molting cycles in captivity.
Nutritional Requirements and Preparation Standards
Successful long-term care for jumping spiders depends on your ability to replicate the nutritional diversity they experience in the wild. Unlike sedentary web-building spiders, jumping spiders are active hunters that rely on acute visual acuity and rapid locomotion to secure prey. Consequently, the prey must not only be nutritionally dense but also physically capable of triggering the spider’s predatory response.
Pre-Feeding Checklist and Equipment
- Essential Gear: Long-handled precision feeding tweezers (at least 8–10 inches), small deli cups or ventilated enclosures, and a fine-mist spray bottle for hydration.
- Nutritional Supplies: Cultured flightless fruit flies (Drosophila melanogaster for spiderlings, Drosophila hydei for juveniles), pinhead crickets, or small blue bottle fly spikes.
- Environmental Standards: A temperature range of 72°F to 80°F and a humidity level of 50–60% must be maintained to support the metabolic rate required for digestion.
- Prerequisite Knowledge: Understanding the spider's instar stage is mandatory; a spiderling requires prey roughly the size of its head, while adults can handle prey up to the size of their abdomen.
Procedural Workflow for Successful Feeding
Feeding a jumping spider is a tactical interaction that requires patience and a controlled environment. Because these spiders are prone to stress, sudden movements or excessive interference during the hunt can cause them to retreat, leading to a failed feeding attempt.
Step 1: Prey Sizing and Selection
The most common mistake in spider husbandry is offering prey that is too large. If the prey is larger than the spider's cephalothorax, it may defend itself or injure the spider during the attempted capture. Select flightless insects that mirror the prey's natural size-to-predator ratio. If you are using crickets, ensure they have been gut-loaded with high-quality vegetables or commercial insect gut-load formula for 24 hours prior to introduction.
Step 2: Environmental Stabilization
Before introducing prey, ensure the enclosure is secure and the spider is not currently in a "pre-molt" phase. You can identify pre-molt by observing a dulling of the spider’s colors or, most notably, the spider sealing itself inside a thick, opaque white silk hammock. Never feed a spider in pre-molt, as the stress of hunting can cause a botched molt, which is often fatal.
Step 3: Prey Introduction and Observation
Using your tweezers, drop one or two prey items into the enclosure, preferably away from the spider's immediate resting spot. Allow the spider to detect the movement of the prey via its primary anterior median eyes. If the spider does not show interest within 10 to 15 minutes, remove the prey items. Leaving uneaten crickets in the enclosure overnight is dangerous, as crickets can bite or stress a spider that is preparing to molt.
Pro-Tip: If the spider is hesitant to hunt, place the prey in a small, shallow cap or "feeding dish" within the enclosure to concentrate the prey's movement and make it easier for the spider to spot.
Step 4: Post-Feeding Monitoring
Once the spider has successfully captured the prey, it will inject venom to liquefy the prey’s internal organs before consuming the nutrients. After the spider has finished eating, it will typically discard the "bolus" or the dry husk of the insect. Remove this husk from the enclosure within 24 hours to prevent mold growth and bacterial accumulation.
How Spiders Eat - The Infinite Spider
Nutritional Parameters and Prey Comparison
| Prey Type | Life Stage Suitability | Protein Profile | Handling Difficulty |
|---|---|---|---|
| Flightless Fruit Fly (D. melanogaster) | L1–L3 Instar | Moderate | Easy |
| Flightless Fruit Fly (D. hydei) | L4–Juvenile | High | Easy |
| Pinhead Crickets | Juvenile–Adult | Very High | Moderate |
| Blue Bottle Fly Spikes | Sub-Adult–Adult | Exceptional | Easy |
| Mealworms (Small) | Sub-Adult–Adult | Moderate | Difficult |
Troubleshooting Common Feeding Failures
- Root Cause: Prey Rejection. If the spider ignores the prey, it may be fully satiated, or the prey species might be unpalatable. Actionable Fix: Wait 48 hours before offering a different type of prey, such as switching from crickets to flies.
- Root Cause: The Spider is Hiding. If the spider stays inside its silk hammock during feeding hours, it is likely in pre-molt or simply not hungry. Actionable Fix: Do not attempt to force the spider out. Skip the feeding and re-check the spider's abdominal size in three days.
- Root Cause: Prey Escaping/Hiding. Smaller insects often disappear into substrate or crevices. Actionable Fix: Use a "feeding zone"—a clear plastic divider or a bare-bottom section of the enclosure—to prevent prey from finding cover where the spider cannot reach them.
Frequently Asked Questions
How often should I feed my jumping spider?
Young spiderlings require food every 2 to 3 days to support rapid development. Adult jumping spiders have slower metabolic rates and typically require feeding only once every 4 to 7 days, depending on the size of the prey offered.
Is it necessary to provide water separately from food?
Yes, jumping spiders require hydration. You should mist one side of the enclosure with distilled water every other day, creating small droplets that the spider can drink from; do not provide a standing water dish, as the spider may fall in and drown.
Can I feed my jumping spider insects caught from outside?
Wild-caught insects pose a significant risk of transmitting parasites, mites, and pesticides into your spider’s environment. Always purchase lab-cultured, feeder-grade insects from reputable breeders to ensure the safety and health of your pet.
How do I know if my jumping spider is overweight?
An overweight spider will have an abdomen that is significantly distended, often looking rounded or "taut" like a balloon. If the abdomen appears extremely swollen and the spider is struggling to move, reduce feeding frequency until the abdomen returns to a normal, slightly elongated, and soft appearance.
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