How to Breed Jumping Spiders: A Beginner’s Guide

Breeding jumping spiders is one of the more accessible projects in the invertebrate hobby, but it carries real welfare weight: a single successful Phidippus regius pairing can release 50 to 200 spiderlings (source: Animal Diversity Web), each requiring its own enclosure within weeks of dispersal. This guide covers the full breeding workflow before the egg sac appears: deciding whether to breed at all, confirming both spiders are mature, conditioning the female, the supervised pairing sequence, what to do when the female is unreceptive, post-mating separation timing, egg sac development and infertile-sac signs, multiple sacs from one mating via stored sperm, ethics of clutch placement, and the genetics traps that hurt captive lines. The downstream rearing pipeline (incubation, the first-instar cluster phase, separation logistics, individual enclosures, feeders, mortality, and rehoming) is a distinct multi-week project that we treat as its own workflow rather than tack on to this guide.

Should You Breed Jumping Spiders at All?

Most keepers should not breed unless they have buyers lined up, several weeks of feeder culture output ready, and the patience for daily sling checks across dozens of cups. The biology is straightforward, but the rehoming and welfare commitment is where casual breeding goes wrong. Plan the placement of 50 to 100+ surviving slings before you ever pair the adults.

Two honest questions to answer before pairing: who takes the spiderlings, and where do the feeders come from? A single Phidippus regius sac releases 50 to 200 slings (source: Animal Diversity Web), and even with realistic 30 to 50 percent attrition through early instars you can expect 30 to 150 individual cups running on a daily-to-every-two-days feeding schedule. That is months of springtails and flightless fruit flies, separation labor, and listing/shipping work if you intend to rehome rather than euthanize.

Breeding is also a teaching project that exposes the species’ less photogenic biology: sexual cannibalism, embryo failure, stuck molts, sibling cannibalism, and the slow but real attrition of any clutch. Going in with welfare-first expectations protects both the animals and your enthusiasm for the hobby. If your husbandry foundation is still settling (heating, hydration, prey sizing), pause and work the jumping spider care guide until the routine is automatic before adding 100 dependents to your collection.

In our keeper community, the breeders we trust most plan clutches around an existing buyer list, decline to pair when the rehoming network is uncertain, and prioritize lineage diversity over raw output. That is the standard this guide is written to.

Prerequisites: Two Mature, Healthy, Same-Species Spiders

Confirm both spiders are sexually mature, well-fed, fully recovered from their most recent molt by at least two weeks, and identified as the same species before any pairing. Males mature at their final molt and show enlarged club-shaped pedipalps; females mature at their final molt and look noticeably more robust than their juvenile form. Pairing immature spiders wastes time and risks injury to both.

Sex and Maturity Confirmation

Males reach maturity at their final (ultimate) molt. The unmistakable signal is the pedipalps: the small leg-like appendages near the mouth swell into bulbous, club-shaped structures often described as “boxing gloves” (source: Por Amor Art). These house the sperm-transfer organs (palpal bulbs). Pedipalps need roughly one to two weeks post-final-molt to harden and become functional, so a freshly molted male should rest before he is paired (source: Por Amor Art).

Females mature at their final molt as well. Confirmation is less visual than for males: look for full adult body size, the formation of the epigynum (a small sclerotized plate on the underside of the abdomen near the book lungs), and a noticeable increase in robustness compared to juvenile silhouette. Our jumping spider sexing guide walks through both the pedipalp and epigynum checks with worked examples for the species commonly kept in the hobby.

Same-Species Matching

Only pair spiders of the same species. Cross-species pairings between, for example, Phidippus regius and Phidippus audax do not produce viable offspring because the species-specific courtship signals and chemical pheromones do not align, and most cross-species introductions end with the female treating the male as prey rather than a potential mate (source: Por Amor Art). Even within a species, regional populations may have visible morphological differences (Bahama vs Soroa locality P. regius, for example), and serious breeders track locality to preserve those lineages cleanly. If you are not certain of your spider’s species, work through the jumping spider identification guide before committing to a pairing.

Condition Assessment

Both spiders should be heavy-bodied, hydrated, and at least two weeks post-molt. A male with soft, unhardened pedipalps cannot transfer sperm successfully. A female with a recently shed cuticle is fragile and slow to respond to courtship. A dehydrated or underweight spider on either side raises injury risk for both. Use our jumping spider health signs guide to walk through abdomen plumpness, leg coordination, response to touch, and other quick condition checks before introducing the pair.

Conditioning the Female Before Pairing

Feed the female heavily for the seven to ten days before introducing the male. A well-fed female with a visibly rounded abdomen is significantly less aggressive during courtship than a food-deprived female and dramatically less likely to engage in pre-copulatory sexual cannibalism. This is one of the most evidence-supported interventions in the entire breeding workflow.

Recent experimental work on Phidippus audax divided virgin females into three feeding treatments (well-fed, 14-day food-deprived, and 28-day food-deprived) and tested them against males in controlled mating trials. Food-deprived females showed significantly higher rates of aggression and pre-copulatory cannibalism and lower mating success across both deprivation lengths (source: Society for Integrative and Comparative Biology). The signal is clear: hunger flips a female’s response to a courting male from “potential mate” to “potential meal.” Well-fed females are not perfectly safe partners, but the risk profile is far better.

Practical conditioning protocol:

• Days -10 to -7 before pairing: Offer prey every other day. Fruit flies, small pinhead crickets, or a single black soldier fly larva per feeding works well.
• Days -7 to -3: Increase to daily feeding. Two appropriately sized prey items per day is reasonable for adult P. regius.
• Days -3 to -1: Slow back to every other day. You want her hungry enough to be interested but not so hungry she treats the male as food.
• Day of pairing: Skip the morning feeding. A fully starved female is dangerous; a moderately satiated female with a slight prey drive is ideal.

A visibly plump abdomen is the practical sign you have conditioned correctly. If the abdomen is shrunken or wrinkled, postpone pairing by a week and feed more aggressively. If the abdomen is so distended she looks pre-molt, postpone until she has fully recovered from the impending molt, which is at least two weeks out.

The male needs the opposite preparation: keep him in good condition but not heavy, since a stressed or overfed male performs courtship displays poorly. Feed him every two to three days and confirm his pedipalps are fully sclerotized (dark, hardened) before introducing him.

The Supervised Pairing Sequence

Introduce the male into the female’s enclosure (not the reverse), supervise the entire interaction from start to finish, and remove the male the moment copulation ends or if the female signals rejection. The pairing window is when male mortality risk is highest, and unsupervised pairings routinely end with a dead male and a still-unmated female. Plan to be present for two to three hours, with no distractions, the day of the pair.

Step 1: Introducing the Male

Place the male into the female’s enclosure using a soft watercolor brush or a small clear catch cup. The female is in her own scent-marked, familiar territory, which keeps her movements more predictable and reduces erratic defensive behavior. The reverse introduction (moving the female into the male’s enclosure) destabilizes her and increases the chance she perceives the encounter as a territorial intrusion rather than courtship.

Once the male is in, he will quickly detect the female’s silk-borne pheromones and orient toward her. Do not leave the room. Jumping spider pairings must be supervised every minute from this point forward.

Step 2: Watching the Courtship Display

The male’s courtship display is one of the most elaborate behavioral sequences in the arthropod world. In Phidippus species the display involves raising the front legs and waving them in a slow zigzag pattern, vibrating the pedipalps and body, performing a stuttered approach toward the female, and producing substrate-borne vibrations that travel through the silk and enclosure floor. Research on the closely related Phidippus clarus shows that vibratory courtship rate is positively correlated with male leg size and is a strong predictor of mating success, indicating that the female is using the signal to assess male quality in real time (source: Behavioral Ecology).

The female’s response determines whether copulation will proceed:

• Receptive signals: She remains still, lowers her body and front legs to the substrate, turns to face the male without raising her front legs in threat, and allows him to approach. Some females will also vibrate slightly in response.
• Unreceptive signals: She raises her front legs vertically in a threat posture, lunges at the male, turns and flees, or actively pursues him. Any of these means she will not accept this male right now.
• Ambiguous signals: Frozen posture with raised legs (rather than fully lowered) means she is undecided. Continue watching but be ready to extract the male if she escalates.

If she signals rejection, separate the pair immediately. Use a soft brush or catch cup to remove the male without picking him up by hand. Do not force the interaction. You can try the same pairing again in three to five days, often with a different time of day or a fresh enclosure, but some females will never accept a particular male regardless of how long you wait. Try a different male before assuming the female is infertile.

Step 3: Copulation

If she lowers her body and the male reaches her, he will climb onto her cephalothorax, position himself with his body angled across hers, and insert one pedipalp into her epigynum on the underside of her abdomen. Copulation in Phidippus typically lasts from a few minutes to over an hour, and the male commonly turns the female’s abdomen mid-mating and inserts the second pedipalp on the opposite side (source: Wikipedia Phidippus clarus). This dual-pedipalp insertion delivers sperm from both palpal bulbs and is typical for the genus.

Do not intervene during active copulation. Trying to separate a mating pair can injure both spiders and may also trigger immediate cannibalism. Watch quietly and time the mating so you can predict roughly when it will end.

Step 4: Immediate Post-Mating Separation

Once the male disengages, remove him from the enclosure within seconds. This is the most dangerous moment in the entire pairing. Females routinely turn on disengaging males, and in the wider spider literature the evolutionary logic of post-copulatory cannibalism is well-established: a male who has already transferred sperm contributes more to offspring fitness as a meal than as a continuing competitor for the female’s foraging effort (source: Wikipedia entry on spider cannibalism). The female does not need to be hungry to attack. She just needs the male to be in reach.

Keep your removal tools ready in your hand throughout the mating: a soft size 0 brush, a clear catch cup with a thin cardboard lid, and the male’s recovery enclosure pre-prepared on the bench next to you. The moment the male dismounts, brush or cup him out. Do not chase him with the brush if he is moving fast. Let him climb onto the bristles voluntarily.

If you want to use the male in additional pairings, give him at least seven to ten days of recovery with heavy feeding before the next attempt. Sperm reserves regenerate, but a male who has just survived a mating is stressed and physiologically depleted, and rushing him into a second pairing dramatically increases the chance he loses the next courtship.

After Mating: Egg Sac Development and Female Behavior

A successfully mated female will produce her first egg sac within one to several weeks, then guard it inside a thick silk retreat for two to four weeks while the embryos develop. During this period she will eat more before laying, fast through the guarding window, and refuse to leave the retreat. Most behavioral and husbandry mistakes during this phase come from over-interaction; the correct intervention is almost always to leave her alone.

Recognizing a Gravid Female

Within one to two weeks of a successful pairing the female’s abdomen swells visibly and she enters a heavy-feeding phase, eating two or three prey items per session if offered. She will also begin reinforcing her silk retreat, layering it thicker and adding more anchor points than her normal nightly sleeping web. Practical signs that she is preparing to lay:

• Abdomen larger than her typical post-feeding profile, with a slightly mottled or stretched appearance through the cuticle
• Increased appetite for the first one to two weeks post-pairing, then a sharp drop in interest as laying approaches
• Construction of a thicker, more opaque silk retreat with reinforced anchor points
• Decreased general activity, longer periods inside the retreat, less responsiveness to enclosure disturbance

Most jumping spiders lay their first egg sac one day to two weeks after mating, although some females hold the sperm for far longer before producing a sac (source: My Pet Jumping Spider). If she has not laid by four to six weeks post-pairing and her abdomen has shrunk back to normal size, the mating likely failed and you can pair her again with a different male if available.

The Sac, the Guard, and Why You Leave Her Alone

The female lays her eggs inside a dense silk pouch that she constructs inside her retreat. The sac itself is opaque, off-white to cream-colored, and roughly the size of a small pea for early-clutch P. regius. She wraps her body around or near the sac and stops eating entirely. The guarding period runs two to four weeks from laying to first emergence, with warmer enclosure temperatures pushing the shorter end and cooler conditions stretching it.

Do not open the enclosure to look at the sac. Do not move the enclosure to a new shelf or room. Do not handle the female. Stressed mothers occasionally eat their own egg sacs, a defense behavior that protects energy reserves when she perceives the clutch as compromised. Mist one corner of the enclosure lightly every two to three days to maintain ambient humidity near 60 percent without wetting the sac itself, and otherwise leave the enclosure undisturbed. The full husbandry parameters for the gravid period (75 to 80°F / 24 to 27°C, 50 to 70% humidity, dim ambient lighting) are the same as standard P. regius husbandry, which is covered in depth in our Phidippus regius care guide.

When the Sac Is Infertile or Fails

Not every sac is viable. First-time mothers, very young or very old females, and stressed females all produce higher rates of infertile or partially infertile sacs. Visual signs of a non-viable sac as it ages include browning or darkening of the silk, visible mold patches, sudden flattening or collapse, and a complete absence of the subtle movement most viable sacs show by week two or three.

Females can also produce infertile sacs from stored sperm or from no mating at all (so-called “duds” laid by unmated females). These will never hatch regardless of how perfectly you maintain the enclosure. If you are confident a sac is non-viable by week four, you can quietly remove it during a routine misting. The female will usually accept the loss without distress and may lay a new sac if she is still well-conditioned and was successfully mated.

Multiple Sacs from One Mating

A single successful mating can produce two to four egg sacs over the female’s remaining lifespan, with each subsequent sac typically smaller and lower in viability than the first. In wild populations of Phidippus audax, females have been documented producing as many as six clutches across a single breeding season, each containing 30 to 170 eggs (source: Animal Diversity Web). Captive P. regius typically produce two to three viable sacs over their adult life with similar variation.

This is possible because female jumping spiders store sperm in specialized organs called spermathecae and meter it out over multiple egg-laying events. One successful pairing therefore commits you to a several-month series of clutches if the female is healthy, which is another reason to plan rehoming infrastructure before the first pair. Polyandry (mating with multiple males) also occurs in Phidippus, with later matings typically following longer courtship displays as the female grows more selective (source: Wikipedia Phidippus clarus). For the captive breeder, the practical implication is that a female who produces a second or third sac is mining sperm from her first mating, not from any later opportunistic pairings.

Hatching, Dispersal, and the Handoff to Spiderling Care

Spiderlings emerge from the sac two to four weeks after it is laid, cluster on or near the silk for several days, then begin dispersing across the enclosure as their yolk reserves deplete. Active separation into individual cups happens during the dispersal-to-active-hunting window, typically late first to early third instar, and is the labor-intensive day in the entire breeding project.

The newly emerged spiderlings are 1 to 2 mm long, translucent, and survive on yolk reserves carried in their abdomens. They do not yet hunt prey and do not need misting in the first few days. The cluster phase under the mother’s protection lasts three to seven days for P. regius in captivity, with longer protection windows documented in wild Phidippus apacheanus and related species (source: Animal Diversity Web on Phidippus apacheanus). The mother does not attack her own offspring during this cluster phase and her presence keeps the group calm.

Once two or three slings begin walking independently across the enclosure, the dispersal phase has begun and you have five to fourteen days before serious sibling-predation risk emerges. Sibling cannibalism in jumping spiders is not driven by hunger alone. It is predatory behavior that activates as the slings develop prey-recognition drive, which is why even well-fed clutches eventually separate themselves by attrition if you do not intervene.

The full operational workflow for the dispersal-and-separation day (preparing dozens of individual cups, the size 0 brush technique, working over a containment tray, feeder culture readiness, instar-by-instar feeding, mortality patterns, and rehoming logistics) is covered end-to-end in our jumping spider spiderling care guide. It is a deliberately separate article because rearing 100+ slings is a multi-week project distinct from the pairing-and-sac-development workflow this guide covers.

Genetics, Lineage, and Inbreeding Risk

Avoid pairing siblings or first-degree relatives, source unrelated breeding stock where possible, and track lineage on every pair you produce. Inbreeding is not as immediately catastrophic in spiders as it is in mammals, but multi-generational inbreeding in captive lines produces visible declines in egg viability, sling vigor, and adult longevity. The hobby’s long-term collection health depends on breeders treating genetics as a real input rather than ignoring it.

Captive jumping spider lines often originate from a small number of founder females. Slings purchased from the same breeder in the same batch are frequently siblings or first cousins, and pairing two of them produces an inbred clutch by default. The most commonly reported outcome among hobby breeders who have tracked multi-generation inbreeding is that pairings still produce sacs through F1 and F2 generations but viability drops sharply by F3, with some F3 females laying empty sacs or refusing to mate (source: Arachnoboards keeper discussion). Whether this is a pure inbreeding effect or interacts with the absence of natural seasonal cycling in captivity remains debated, but the practical guidance is the same: outbreed when you can.

Practical lineage practices we follow:

• Track who came from where. Every spider in our breeding records carries a source identifier (breeder, batch date, parent IDs if known). This is the single highest-leverage thing a small breeder can do.
• Outcross every other generation at minimum. If you produce an F1 clutch, source the F2 mates from a different lineage. Three generations of full siblings is the failure pattern most often reported in the hobby.
• Treat morph projects with extra discipline. Phenotype-selective breeding (Bahama, Soroa, apricot) inherently narrows the gene pool faster. Build in deliberate outcrosses to wild-type lineages every few generations.
• Be honest with buyers. Disclose known lineage relationships so buyers can avoid pairing siblings they purchased together.

Hybridization between species (for example P. regius × P. audax) is a separate concern. Cross-species pairings rarely produce viable offspring in jumping spiders, but the few “hybrid” listings that occasionally appear in the hobby almost always reflect misidentification rather than true hybridization. Confirm species identity with care before listing offspring, and verify locality if you sell into the morph-focused part of the market. The best jumping spider species guide covers the species and morph landscape in more detail.

Ethics, Rehoming, and the Welfare Math

Producing a clutch you cannot ethically place is the failure mode of casual breeding. Plan placement before pairing: lock in a rehoming channel, confirm at least partial buyer interest, and accept that the breeder, not the buyer, carries the responsibility for what happens to unsold slings. Three things separate responsible breeders from irresponsible ones.

First, confirm buyer interest before pairing. The most experienced breeders we work with maintain a rolling waiting list and decline to pair if the list cannot reasonably absorb the expected output. A clutch with no plan attached creates either welfare compromises (slings held in undersized cups past their healthy window) or euthanasia of unsold animals, which is the dark side of the hobby that almost no one wants to discuss but every breeder eventually faces.

Second, hold slings only as long as you can guarantee their welfare. Slings should rehome at third to fourth instar (typically three to six weeks post-dispersal for P. regius), when they are robust enough to ship and transition. Holding them longer means more individual enclosures, more feeders, more space, and a steeper welfare debt if you cannot find buyers. If you find yourself holding 80 unsold slings past sixth instar, the math has already gone wrong.

Third, be honest with buyers about what they’re getting. New jumping spider keepers often underestimate adult husbandry needs after watching the slings hunt fruit flies in cute condiment cups. A responsible breeder includes a basic care card with each rehoming, links the buyer to a proper care reference, and is honest about P. regius lifespan (a year to roughly 18 months in captivity for females, less for males). Sending naive buyers home with a “low-maintenance starter pet” framing produces neglected adults six months later.

Common rehoming channels (welfare context, not endorsement):

• MorphMarket is the largest captive-bred invertebrate marketplace, with searchable species and morph listings and buyer reputation tracking.
• Species-specific Facebook groups and Discord communities function as both peer-support spaces and informal buyer pipelines.
• Local reptile and invertebrate expos let you sell in person and bypass shipping risk entirely.
• Arachnoboards classifieds remain an active hobbyist marketplace with a long memory for breeder reputation.

Pricing context: standard wild-type P. regius slings at third instar typically sell for $15 to $30 USD, with premium morphs commanding $40 to $200+ depending on lineage and demand. The full pricing picture across species, morphs, and adult vs sling pricing is in our jumping spider cost guide, and the buyer-side view of the same market is in our where to buy jumping spider guide. Breeding can offset hobby costs but rarely generates significant income once feeder, enclosure, and time costs are properly accounted.

Breeding Timeline Summary

Frequently Asked Questions

How long after mating does a female jumping spider lay eggs?

Most successfully mated female jumping spiders lay their first egg sac between one day and two weeks after copulation, with some holding stored sperm for considerably longer before laying. Phidippus regius commonly produces a first sac within one to three weeks post-mating in captive conditions at 75 to 80°F. If she has not laid by four to six weeks and her abdomen has returned to normal size, the mating likely did not take and a second attempt with a different male is reasonable. Females can also produce infertile sacs from stored sperm or with no mating at all, so a sac alone is not proof of successful fertilization until you see signs of embryo development.

How many times can a female jumping spider breed in her lifetime?

A captive Phidippus regius female typically produces two to three viable egg sacs over her adult lifespan from a single successful mating, drawing on sperm stored in her spermathecae. Wild Phidippus audax females have been documented producing as many as six clutches in a single breeding season with 30 to 170 eggs per clutch (source: Animal Diversity Web). Each subsequent sac tends to be smaller and have lower viability than the first. Females can also mate with multiple males if the opportunity arises, with later matings typically following longer courtship displays as the female becomes more selective.

What should I do if the female kills the male during pairing?

If she kills him before or during copulation, the mating is unsuccessful and you will need a different male for a retry. If she kills him after copulation completes, the mating was likely successful and she may still produce a viable egg sac. Male mortality during or after pairing is a normal aspect of jumping spider reproductive biology rather than a husbandry failure on your part. To reduce the rate at which it happens, condition the female with seven to ten days of heavy feeding, supervise the pairing every minute, and remove the male the moment he disengages from the female.

Can I breed jumping spiders of different species together?

No, cross-species pairings in jumping spiders do not produce viable offspring. The courtship signals (visual displays, vibratory frequencies, pheromone signatures) are species-specific, so a male Phidippus audax attempting to court a female Phidippus regius almost always reads as “prey” rather than “mate” and ends in the female cannibalizing the male. The few “hybrid” listings that appear in the hobby almost always reflect misidentification of one of the parents rather than true interspecific hybridization. Confirm species identity carefully before pairing or listing offspring.

How old does a jumping spider need to be to breed?

Both spiders must be sexually mature, which occurs at their final molt. For Phidippus regius, males reach maturity at roughly four to six months of age depending on temperature and feeding rate, and females typically mature at five to seven months. Males need an additional one to two weeks post-final-molt for their pedipalps to fully harden before they can transfer sperm successfully. Females need at least two weeks post-final-molt to recover physiological condition. Pairing immature spiders or freshly molted spiders wastes time and risks injury to both animals.

Is breeding jumping spiders profitable as a hobby business?

Breeding can offset hobby costs but rarely generates meaningful income once feeder, enclosure, time, and shipping costs are honestly accounted. Standard wild-type P. regius slings at third instar typically sell for $15 to $30 USD, while premium morphs (Bahama, Soroa, apricot) command $40 to $200+ depending on lineage and current demand. A single clutch of 100 surviving juveniles at $20 each grosses $2,000, but the feeder cultures, individual cups, shipping supplies, and labor across the rearing period easily consume the majority of that gross. Profitability scales with volume and morph rarity rather than with casual breeding of common stock.

Why is the female refusing to mate?

Common causes of female rejection include recent feeding (she is satiated and uninterested), recent molting (still physiologically vulnerable), insufficient maturity, sexual inhibition from a previous mating (research on Servaea incana documents rapid post-copulatory sexual inhibition lasting weeks; source: PLOS One), and simple incompatibility with this particular male. Females can also be temperamentally selective and reject otherwise viable males. Wait three to five days and try again, ideally with a different male if available. If she rejects multiple males across multiple attempts, she may simply not be receptive this cycle and a second attempt later in the season is more productive than continued forcing.

Do I need to separate the mother from the egg sac after hatching?

Not during incubation or the early cluster phase. The female typically guards the sac and tolerates her newly emerged spiderlings without attacking them through the first several days to weeks of cluster behavior. Leave her in place until the spiderlings have begun walking independently across the enclosure and you are ready to separate the clutch into individual cups. At that point, return her to her own enclosure so you can work the slings out one by one without her in the way. She may produce a second sac within several weeks if she retains stored sperm and remains well-conditioned. The full dispersal-to-separation workflow is covered in our spiderling care guide.

This article was researched and written by the ExoPetGuides editorial team with AI-assisted drafting. All husbandry parameters, behavioral observations, and reproductive references were independently verified against peer-reviewed arachnology literature, recognized husbandry authorities, and experienced keeper community sources. ExoPetGuides does not sell breeding stock, feeder cultures, or spider supplies and has no affiliate relationship with any breeder, platform, or supplier named in this guide.

This guide provides general husbandry information for keepers considering or actively pursuing jumping spider pairings. It is not a substitute for professional veterinary advice. If a breeding female, gravid female, or recently emerged spiderling shows persistent illness signs that do not resolve with parameter correction, consult a qualified exotic-animal veterinarian experienced with invertebrates.