Both male and female spiders possess silk glands and can produce silk, but in most web-building species, females do the heavy lifting when it comes to constructing and maintaining prey-capture webs. Males of many species build webs during their juvenile stages, then largely abandon web construction after reaching sexual maturity, when their priorities shift almost entirely to finding mates. The story is more interesting than a simple yes-or-no answer, though, because males still use silk in surprising and specialized ways even after they stop building conventional webs.
Why Females Are the Master Web Builders
In the vast majority of orb-weaving and web-building species, the female is the one sitting at the center of a large, carefully constructed web. She builds it, repairs it, and rebuilds it as often as daily. The web is her livelihood: it catches the insects she needs to fuel egg production, and she tends to stay on or near it for most of her life. Female spiders also use silk for a wide range of purposes beyond prey capture, including wrapping and immobilizing caught insects, laying draglines that connect them to the web structure, lining burrows, and constructing multilayered egg sacs that protect developing offspring from predators, parasites, and temperature swings.1International Journal of Zoology. Spider Parental Care and Awe-Inspiring Egg Sac (Cocoon)
When females lose legs to predators or accidents, they compensate by adjusting their web architecture rather than giving up silk construction altogether. Field studies of orb-weaving spiders found that roughly 10 to 13 percent of adult females in wild populations were missing at least one leg. These injured spiders reduced their overall silk investment and increased the spacing between spiral threads, but they kept the total capture area of their webs about the same size.2PubMed. Loss of legs: is it or not a handicap for an orb-weaving spider? The web is simply too important for a female to abandon, even when building one becomes more difficult.
What Happens to Male Silk Production After Maturity
As juveniles, male spiders in web-building species construct small webs and catch their own food, just as females do. The divergence happens at the final molt into adulthood. Once a male matures, his body changes dramatically: his pedipalps (the small leg-like appendages near his mouth) develop into elaborate mating organs, and in many species his silk-producing apparatus begins to degrade. Researchers examining male Darwin’s bark spiders found that specific silk-producing structures called cylindrical gland spigots, which females use to spin the tough outer layers of egg sacs, were largely non-functional in adult males. About 75 percent of the relevant spigots on adult males had degenerated into mere nubs, with just the base remaining and no shaft capable of conducting silk.3Scientific Reports. Hers and his: Silk glands used in egg sac construction by female spiders potentially repurposed by a ‘modern’ male spider
This physical transformation reflects a strategic shift. Adult males in many species stop feeding entirely or feed only rarely. Their abdomens shrink. Their remaining energy goes toward locomotion and mate-searching rather than web maintenance. Building a web and waiting for prey to land on it becomes a bad use of time when your only remaining biological imperative is reproduction. Some adult males of highly dimorphic species are so tiny compared to females that they can walk across a female’s web without triggering the vibrations that would alert her to prey.
The Sperm Web, a Uniquely Male Silk Structure
Despite their retreat from prey-capture webs, adult male spiders have not given up silk entirely. One of the most fascinating male-only silk constructions is the sperm web, a small, specialized silk sheet that males build for the sole purpose of reproductive preparation. A male spider deposits a droplet of sperm onto this tiny web and then uses his pedipalps to suck it up, essentially loading his mating organs before going in search of a female. Researchers observing a subsocial spider species documented this process in detail: of thirty male-female pairs placed together, twenty-two males built sperm webs and performed sperm induction after copulating, recharging their pedipalps for potential future matings.4BioOne Complete. Loading the male pedipalps: sperm induction in a subsocial spider
The sperm web is small and temporary, nothing like the intricate orb a female might build. But it demonstrates that males retain the ability to spin functional silk and use it in a very targeted way. In some species, males also lay draglines as they travel, which serve both as safety tethers and, it turns out, as navigational aids.
How Males Use Female Webs for Courtship
If adult males are not building their own webs, where does mating happen? In many orb-weaving species, the answer is on the female’s web. Males approach a female’s web and perform elaborate vibratory courtship displays. In the orb-weaver Argiope keyserlingi, researchers identified three distinct courtship elements: shudders, abdominal wagging, and mating thread dances that combined plucking and bouncing on a silk line. Males would hang upside down from a mating thread and strum it with their legs, interspersed with violent bouncing. The performance continued until the female moved onto the mating thread and adopted a copulatory position.5PLoS ONE. The Influence of Vibratory Courtship on Female Mating Behaviour in Orb-Web Spiders (Argiope keyserlingi, Karsch 1878)
This is not a trivial interaction. The female’s web is both a communication channel and a danger zone. The vibrations a male produces must be clearly distinct from those made by trapped prey, or the female may attack him instead of accepting him as a mate. Males in dimorphic species like Argiope aurantia sometimes try to sidestep this problem by timing their mating attempts to coincide with the female’s final molt, when she is physically unable to attack.6Oxford Academic (Behavioral Ecology). Competing dwarf males: sexual selection in an orb‐weaving spider In these species, multiple males may crowd onto or near a single female’s web, waiting for their moment. The web becomes a stage for male competition as much as it is a food trap.
When Males Build Their Own Webs and Share Food
There are notable exceptions to the “males abandon web-building” pattern. In the spider Manogea porracea, males build their own small webs and use them not just for catching food but for provisioning females. Males in this species offer prey to females both before and after mating. Rather than handing food over directly, males vibrated the female’s web to get her attention, then placed prey where she could retrieve it. For small prey, males would toss items from their own web toward the female. For larger catches, males carried the prey along connecting support threads to deliver it directly.7Oxford Academic (Behavioral Ecology). The unusual food provisioning by males beyond mating in the spider Manogea porracea (Araneidae)
This food-sharing behavior happened even outside mating contexts, which makes it unusual among spiders. The male maintains his own web as a productive asset and uses it to strengthen his relationship with the female while guarding her from rival males. It is one of the clearest examples of a male spider using a self-built web as part of a long-term reproductive strategy rather than simply abandoning silk work after reaching adulthood.
How Silk Doubles as a Chemical Billboard
Female spiders’ webs serve a function that has nothing to do with catching food: they broadcast chemical signals. Female web-building spiders release pheromones from their webs that attract mate-seeking males over a distance, and they also deposit contact pheromones on the silk itself that trigger courtship behavior when males arrive.8PubMed Central. Origin, structure and functional transition of sex pheromone components in a false widow spider In false widow spiders, researchers traced the source of key pheromone compounds to specific silk glands, the posterior aggregate glands, meaning that the chemical signals are literally woven into the silk structure.
These pheromone signals are not static. Research on wolf spiders showed that the attractiveness of dragline silk pheromones changes with female age. Male spiders showed significantly stronger courtship responses to silk laid down by young and middle-aged females compared to older ones, with shorter hesitation times, more vigorous palpal drumming, and increased leg vibrations.9PubMed Central. The Age of Female Pardosa pseudoannulata Affects the Attractiveness of Their Dragline Silk Sex Pheromones to Males From the male’s perspective, a female’s silk is not just a physical structure but a rich source of information about her species, mating status, and reproductive quality. Males that cannot build webs of their own are, in a sense, reading the webs of females instead.
Spiders That Never Build Webs but Still Need Silk
Not all spiders build webs, and this is where the question gets an interesting twist. Jumping spiders, the largest spider family by species count, are visual predators that stalk and pounce on their prey rather than trapping it in silk. Both males and females in these species skip web construction entirely. But they still produce silk, and they still depend on it. Jumping spiders trail dragline silk behind them as they move, and researchers discovered that this silk does more than prevent falls. During jumps, the dragline actively stabilizes the spider’s body in midair, functioning as a kind of attitude-control system rather than just a safety line.10PubMed Central. More than a safety line: jump-stabilizing silk of salticids
Crab spiders, trapdoor spiders, and many ground-hunting species also fall into this category. None build aerial prey-capture webs, yet all produce silk for egg sacs, burrow linings, molting pads, and safety lines. The ability to spin silk is universal across spiders, even in families that diverged from web-building ancestors millions of years ago. So the answer to “do both sexes spin webs” partly depends on what you mean by “web.” If you mean an orb or sheet designed to intercept flying insects, many species have both sexes skipping that. If you mean any deliberate silk structure, both sexes in virtually every spider species produce them.
Social Spiders and Communal Webs
A small number of spider species are social, living in shared webs that can be enormous, sometimes spanning entire trees. In these colonies, which can number in the hundreds or thousands, both males and females contribute to web maintenance and prey capture as juveniles. After reaching maturity, though, the division of labor follows a familiar pattern. Studies of social spider colonies have found that males contribute little to nest building or prey capture once they are adults, while larger individuals of both sexes tend to carry prey to the main nest.11Cell Press (Current Biology). Social spiders
Social spider species represent a tiny fraction of the roughly 50,000 described spider species, but they are instructive because they show the male tendency to reduce silk investment after maturity holds even in cooperative societies. The communal web is a shared resource built and maintained mostly by females, with males living in it as something closer to tenants than co-builders.
Why Size Matters for Web Building
The pronounced size difference between males and females in many web-building species plays a direct role in who builds webs and who does not. In some orb-weavers, females can be several times the body length of males and hundreds of times heavier. A larger body means more silk glands, the ability to produce more silk per unit time, and the structural capacity to build and maintain a large web. Males of these dimorphic species are often so small that building a full-sized web would be impractical even if they tried: they lack the body mass and silk reserves to produce and repair a structure large enough to catch meaningful prey.
This extreme size difference also changes the risk calculus. A small male sitting on a web is conspicuous to predators like birds and wasps but catches relatively little food. Roaming in search of mates, despite the risks, can be a better survival strategy. Research on golden orb-weavers found that the local sex ratio on females’ webs was male-biased for most of the season, meaning multiple males were often present on or near each female’s web.6Oxford Academic (Behavioral Ecology). Competing dwarf males: sexual selection in an orb‐weaving spider These males were not maintaining their own webs. They were living on the margins of the female’s web, sometimes stealing small insects that got caught in it, while jockeying for mating opportunities.
The Misconception That Males Cannot Spin Silk
A common misunderstanding is that male spiders physically cannot produce silk. This is wrong. Males of web-building species have functional spinnerets and silk glands throughout their lives. What changes at maturity is the relative investment in different gland types and the behavioral drive to use them for web construction. Some specific gland types degrade, as with the cylindrical gland spigots discussed earlier, but the major ampullate glands responsible for dragline silk and basic structural threads remain functional. Males use these glands constantly, trailing dragline silk as they walk and spinning the small silk structures they need for reproduction.
The confusion probably arises because people encounter large, conspicuous female webs and rarely see a male spider sitting on its own web. But absence of evidence is not evidence of absence. Male spiders are generally smaller, more cryptic, and more mobile than females. They simply do not advertise their presence the way a female on a glistening orb web does. A male may have built dozens of small webs during his juvenile instars, then switched to a nomadic lifestyle once he matured. Both phases involve silk production; only one involves building the kind of web most people picture when they think of spiders.
Silk Use Across the Spider Life Cycle
To fully appreciate the question, it helps to think about silk across a spider’s entire lifespan rather than just the adult stage. Spiderlings of both sexes begin producing silk almost immediately after hatching. In many species, young spiders use silk for “ballooning,” releasing long threads that catch the wind and carry the tiny spider to a new location, sometimes hundreds of kilometers away.1International Journal of Zoology. Spider Parental Care and Awe-Inspiring Egg Sac (Cocoon) Both male and female juveniles balloon, build small webs, and produce silk shelters. The sexes are functionally identical in their silk use until the final molt.
After maturity, the silk repertoire narrows for males and expands for females. Females add egg sac production to their toolkit, constructing complex multi-layered structures that can involve several different silk types. Males retain dragline and attachment silk but lose some of the more specialized gland functions. In species where males guard females or co-inhabit a web, males may add silk to the existing structure in minor ways, but they rarely take on a primary role in construction or repair. The overall picture is one of shared capacity with diverging specialization driven by the very different pressures adult males and females face.
Spiders Where Males Do the Unusual
The spider world is extraordinarily diverse, and for nearly every generalization, there is an exception waiting. Beyond the Manogea males that build their own webs and provision food, some male spiders actively modify the female’s web during courtship. Males of certain species cut threads, add silk lines, or bundle sections of the web, apparently to restrict the female’s movement or redirect vibrations to make their courtship signals more effective. The mating thread dances observed in Argiope keyserlingi involve the male building a specialized silk line attached to the female’s web and performing his entire courtship routine on it.5PLoS ONE. The Influence of Vibratory Courtship on Female Mating Behaviour in Orb-Web Spiders (Argiope keyserlingi, Karsch 1878)
In other species, males wrap females in silk during or after mating, a behavior sometimes called a “bridal veil.” The function varies: it may slow the female down to prevent her from attacking the male, or it may serve as a form of mate guarding by making the female temporarily less accessible to rival males. These behaviors, while not web-building in the traditional sense, demonstrate that males remain capable and creative silk users. Silk is the Swiss Army knife of the spider world, and both sexes carry one, even if they open different tools.