Wolf spiders are generalist predators that feed primarily on small, soft-bodied insects and other arthropods, and how often they eat depends heavily on what’s available. In the wild, meals are irregular and unpredictable, sometimes days apart, sometimes multiple catches in a single night. Their bodies are built for this feast-or-famine pattern, storing lipid reserves during good times and burning through them slowly when prey is scarce. The biology behind their feeding habits turns out to be more sophisticated than you’d expect from a spider that doesn’t even build a web.
What Wolf Spiders Actually Eat
Wolf spiders are not picky. Studies of their gut contents and direct field observations consistently show they’ll take whatever small arthropods they can catch and overpower. In agricultural fields, a detailed analysis of wolf spiders in the genus Pardosa found that flies, springtails, and aphids made up roughly 80% of their identified prey by number, with a range of other small insects filling out the rest.1Journal of Applied Entomology. Feeding ecology and predatory importance of wolf spiders (Pardosa spp.) (Araneae, Lycosidae) in winter wheat fields Field surveys in Australian cotton fields found a somewhat different breakdown, with ground crickets being the most common prey item, accounting for about a third of observed catches.2PLoS ONE. Does prey encounter and nutrient content affect prey selection in wolf spiders inhabiting Bt cotton fields? The variation isn’t contradictory; it just reflects whatever small creatures are abundant in a given habitat.
What ties the menu together is body type, not taxonomy. Wolf spiders favor soft-bodied prey they can subdue quickly: flies, aphids, caterpillar larvae, springtails, leafhoppers, small beetles, and crickets. They’ll also eat other spiders, including members of their own species. Those Australian cotton field surveys confirmed intraguild predation in the field, with wolf spiders caught consuming other spiders.2PLoS ONE. Does prey encounter and nutrient content affect prey selection in wolf spiders inhabiting Bt cotton fields? The general rule is that if it moves, it’s roughly the right size, and the spider can grab it, it’s food.
Larger Prey, Including Frogs
Bigger wolf spider species punch above their weight class. The Carolina wolf spider (Hogna carolinensis), one of the largest species in North America, has been documented catching and eating small frogs. A study comparing nutrient intake from frogs versus crickets found that frogs and crickets provide quite different nutritional profiles. Frogs offer less lipid but considerably more lean tissue, and spiders extracted a greater mass of micronutrients from frogs than from crickets.3PubMed Central. Comparing Nutrient Intake by Wolf Spiders (Hogna carolinensis) Consuming Frogs (Acris blanchardi) and Crickets (Gryllodes sigillatus) The spiders consumed essentially none of the lipid available in frog prey but ate about three times more lean tissue from frogs than from crickets.
This doesn’t mean frogs are nutritionally inferior to insects. The lean tissue and micronutrient content may be genuinely valuable, especially for large spiders whose energy demands are high. The finding does suggest, though, that wolf spiders aren’t extracting the same nutrients from every prey type. A frog meal and a cricket meal are nutritionally different experiences, and the spider’s body processes them differently.
How Wolf Spiders Digest Their Food
Wolf spiders don’t chew and swallow the way vertebrates do. They use a process called extra-oral digestion, which essentially means they digest their prey outside their own body. After subduing prey with a venomous bite, the spider releases a cocktail of digestive enzymes into the prey’s body. These enzymes, including proteases, lipases, and others, begin dissolving the prey’s internal tissues from within.4PubMed Central. Characterisation of protein families in spider digestive fluids and their role in extra-oral digestion
The spider then pumps digestive fluid into the prey and sucks the liquefied tissue back out, repeatedly, in a reflux action. The prey’s own exoskeleton or body cavity acts like an external stomach where enzymes mix with dissolved tissue. Special enzymes first break down the protective matrix around the prey’s cells so the main digestive enzymes can access the tissue inside.4PubMed Central. Characterisation of protein families in spider digestive fluids and their role in extra-oral digestion This back-and-forth pumping can take a long time. A single meal might occupy a wolf spider for 30 minutes to several hours, depending on prey size. What’s left behind is often just a dry, hollowed-out husk.
This digestion style has consequences for feeding frequency. Because each meal requires so much handling, a wolf spider that has just eaten a large prey item may not hunt again for a while, simply because it’s still processing what it ate. The gut has a finite capacity, and reflux digestion is time-intensive work.
Feeding Frequency in the Wild
Pinning down exactly how often wild wolf spiders eat is tricky because their feeding is so opportunistic. The field observation rate gives some indirect sense of scale: in the Australian cotton field study, only about 3% of the nearly 600 wolf spiders observed were actively holding prey at any given time.2PLoS ONE. Does prey encounter and nutrient content affect prey selection in wolf spiders inhabiting Bt cotton fields? That low snapshot rate doesn’t mean they rarely eat. It means that at any single moment, most individuals are between meals, searching, resting, or doing something else. But since each meal takes time to handle and digest, a wolf spider in a typical habitat probably catches prey every few days, with significant variation depending on season, habitat, temperature, and prey density.
Lab experiments provide a clearer window into how feeding rate changes with prey availability. When wolf spiders encountered prey more frequently in controlled settings, they didn’t just eat more. They changed how they ate. Handling time per prey item dropped by about 30%, and the rate of consumption increased by roughly 40%.5PubMed. Wolf spider feeding strategies: optimality of prey consumption in Pardosa hortensis The likely explanation is that frequent meals stimulate the spider to produce more digestive enzymes, so the next meal gets processed faster. When prey is abundant, the whole feeding pipeline speeds up.
The flip side is just as interesting. When food is scarce, wolf spiders don’t partially consume prey the way you might expect a wasteful predator to do. Partial consumption didn’t occur until the spiders in these experiments became nearly full.5PubMed. Wolf spider feeding strategies: optimality of prey consumption in Pardosa hortensis A hungry wolf spider thoroughly extracts as much nutrition from each kill as possible. This makes sense for an animal whose next meal is never guaranteed.
Surviving Without Food
Wolf spiders are remarkably good at going without food. Their metabolism is already low compared to warm-blooded animals, and they can dial it down further during starvation. A study of the wolf spider Pardosa prativaga found that oxygen consumption and carbon dioxide output decreased gradually during food deprivation, meaning the spiders were burning less energy as the fast continued.6PubMed. Metabolic consequences of feeding and fasting on nutritionally different diets in the wolf spider Pardosa prativaga The key to lasting through a famine is lipid reserves. Spiders that had been fed lipid-rich prey before starvation survived longer than those fed protein-rich prey, because stored fat is the primary fuel during periods without food.6PubMed. Metabolic consequences of feeding and fasting on nutritionally different diets in the wolf spider Pardosa prativaga
Winter presents its own challenge. Overwintering wolf spiders in the species Schizocosa stridulans maintained their protein levels through most of the cold months, but their lipid content decreased steadily, suggesting they were slowly burning through fat reserves even while largely inactive.7PubMed. Energy balance and metabolic changes in an overwintering wolf spider, Schizocosa stridulans These spiders also accumulated cryoprotectants, substances like glycerol and myo-inositol that help prevent ice damage in their tissues. The levels were lower than what’s typical for arthropods that fully shut down for winter, consistent with the fact that wolf spiders stay at least somewhat active year-round in many climates.
For practical purposes, a healthy adult wolf spider can go weeks without food in favorable temperatures, though it won’t be in peak condition. If you keep wolf spiders in captivity, feeding them once or twice a week with appropriately sized insects is generally adequate. Overfeeding is a real risk in captivity because the spider doesn’t have to work for its meals, and excess food intake can lead to an abnormally distended abdomen.
How They Choose What to Eat
Despite being generalists, wolf spiders are not indifferent to the nutritional content of their prey. Juvenile Pardosa prativaga spiders fed fruit flies that varied in their lipid-to-protein ratio adjusted both how many flies they caught and how thoroughly they extracted nutrients from each one.8Animal Behaviour. Nutrient regulation in a predator, the wolf spider Pardosa prativaga Early on, the spiders seemed to regulate their intake toward a consistent total of lipid plus protein. But as the experiment continued, spiders fed on high-protein, low-lipid prey ramped up their consumption, apparently willing to overconsume large amounts of protein just to get a bit more lipid and energy.8Animal Behaviour. Nutrient regulation in a predator, the wolf spider Pardosa prativaga
This points to lipid being a limiting nutrient for wolf spiders, at least under some conditions. It also shows that these predators aren’t just vacuum cleaners indiscriminately gobbling up whatever they find. They have both behavioral and physiological mechanisms to partially compensate when their diet is nutritionally unbalanced, though they can’t fully overcome poor-quality prey. Spiders stuck on low-lipid diets still ended up with lower body fat than those eating lipid-rich prey, even after adjusting their behavior.
After ingestion, there’s another layer of regulation. Protein that was consumed in excess wasn’t efficiently incorporated into body tissue. The spiders essentially wasted some of the protein they ate when their prey was protein-rich, suggesting a physiological mechanism that prevents protein overload.8Animal Behaviour. Nutrient regulation in a predator, the wolf spider Pardosa prativaga This kind of post-ingestion nutrient management was, until recently, thought to exist mainly in herbivores and omnivores. Finding it in a predator underscored that wolf spiders have a much more nuanced relationship with their food than “catch it, eat it, done.”
Temperature Changes Everything
Wolf spiders are ectotherms, meaning their body temperature tracks their environment, and temperature has a dramatic effect on how much they eat. A study testing predation rates at different temperatures found that killing rates increased significantly as temperatures climbed.9PubMed Central. Temperature dependency of predation: Increased killing rates and prey mass consumption by predators with warming Warmer spiders are faster, more active, and encounter prey more often. They also consumed more of each prey item they killed, particularly more lipid from lipid-rich prey.
This temperature sensitivity has practical implications. If you find wolf spiders in your garden, you’ll notice them hunting more actively on warm summer nights than during cool spring evenings. In tropical and subtropical regions, wolf spiders may eat considerably more often than their counterparts in temperate climates, simply because their metabolic engine is running hotter year-round. On the research side, climate warming could amplify the predatory pressure wolf spiders exert on insect communities, which has cascading effects through the food web that ecologists are still working to understand.
Where They Hunt Matters Too
Wolf spiders are ground hunters, and the surface they’re hunting on affects their success dramatically. A study testing capture rates on different natural substrates found huge differences: wolf spiders caught prey about 34% of the time on sand, but less than 5% of the time on oak leaf litter and under 3% on pine litter.10Animal Behaviour. The effect of substrate on prey capture does not match natural substrate use in a wolf spider The likely reason is that loose leaf litter muffles vibrations and makes it harder for the spider to detect and chase down prey, whereas firm sand transmits vibrations well and provides good traction for a sprinting spider.
The interesting wrinkle is that these spiders don’t necessarily live on the substrates where they hunt best. Their natural habitat preferences don’t always align with their foraging success rates, suggesting that other factors like predator avoidance, moisture, and shelter availability also drive where they settle.10Animal Behaviour. The effect of substrate on prey capture does not match natural substrate use in a wolf spider This tension between hunting efficiency and habitat safety shapes how often a wild wolf spider can actually catch a meal. A spider living in dense leaf litter may be safer from birds, but it’s probably eating less frequently than one living on open ground.
Feeding During Motherhood
Female wolf spiders are famous for carrying their egg sacs attached to their spinnerets and then carrying their newly hatched spiderlings on their backs. This maternal care is energetically punishing. A study of the wolf spider Pardosa saltans found that females lost weight over time despite eating regularly while carrying their cocoon and young.11PubMed. Physiological costs during the first maternal care in the wolf spider Pardosa saltans (Araneae, Lycosidae) The weight loss was most pronounced during the spiderling-carrying phase, when the mother’s predatory behavior was actively inhibited. Lipid levels dropped during this period as well, meaning the mothers were burning through their fat stores while simultaneously eating less.
Once the young dispersed, the females’ weight began climbing again. But the energetic cost of maternal care is a real nutritional drain. A female wolf spider who has recently carried young is likely to be in worse condition than one who hasn’t, and she may feed more aggressively once freed from the burden. This is one reason well-fed females tend to produce more offspring: they enter the maternal care period with larger lipid reserves to draw on.
Males and Females Eat Different Amounts
Male and female wolf spiders don’t eat equally over their lifetimes, and the difference is substantial. Energy budget calculations for the wolf spider Pardosa lugubris found that females ingest roughly three times the total calories that males do over their lives. Females channel about a quarter of their ingested energy into production, including eggs, while males put a smaller share toward production, with a larger proportion going to daily metabolic costs.12Springer Link / Oecologia. Aspects of the ecological energetics of the wolf spider Pardosa (Lycosa) lugubris (Walckenaer) This makes intuitive sense. Females are typically larger, live longer, and have the enormous metabolic expense of producing eggs and then caring for young. Males are smaller, mature faster, and spend more of their energy budget on finding mates.
For the reader wondering how often a particular wolf spider in their house or garden eats, the sex of the spider matters. A large female carrying an egg sac has higher energy needs than a small, roving male, even though the female may be hunting less effectively due to the encumbrance.
Scavenging and Unexpected Food Sources
Most people picture wolf spiders as active hunters, and they are. But the line between hunting and scavenging gets blurry. DNA-based gut content analysis has shown that many generalist ground predators readily eat dead prey. However, at least one wolf spider species, Trochosa ruricola, was found to exclusively feed on living aphids in a mesocosm study, while other ground predators happily ate dead ones.13Pedobiologia. Scavenging and active predation in generalist predators: A mesocosm study employing DNA-based gut content analysis Whether this preference for live prey holds true across all wolf spider species isn’t settled, but it fits with their hunting-oriented lifestyle. Unlike web-building spiders that passively trap prey, wolf spiders rely on detecting movement, so they may not even register a dead insect as food in many cases.
That said, the boundaries of their diet occasionally surprise researchers. Wolf spiders have been documented catching small lizards, frogs, and even fish in some anecdotal reports. Laboratory studies have confirmed the frog-eating behavior in Hogna carolinensis, as mentioned earlier, and the nutritional analysis suggests these vertebrate meals are genuinely worthwhile, not just opportunistic accidents.
Why Farmers Care About Wolf Spider Appetites
Wolf spiders show up in crop fields in large numbers, and their appetite for agricultural pests makes them genuinely useful. Studies in both wheat and maize fields have documented wolf spiders suppressing populations of leafhoppers, thrips, and aphids.14Agriculture, Ecosystems & Environment. Predation by ground beetles and wolf spiders on herbivorous insects in a maize crop In wheat fields, cereal aphids formed a substantial part of wolf spider diets, leading researchers to characterize these spiders as beneficial for crop protection.1Journal of Applied Entomology. Feeding ecology and predatory importance of wolf spiders (Pardosa spp.) (Araneae, Lycosidae) in winter wheat fields
The catch, though, is that wolf spiders are generalists. They eat pest insects, but they also eat other predators, including other spiders and beneficial beetles. This intraguild predation can dilute their net benefit to farmers. A wolf spider that eats a ground beetle that would have eaten 50 aphids may end up being a net negative for pest control in that specific instance. The overall impact seems to be positive for agriculture, but it’s messier than simply counting how many pests a spider eats. In Uruguayan crop systems, wolf spiders themselves were used as prey items in experiments assessing another predator’s diet, highlighting that wolf spiders are part of a complex web of predator-prey interactions, not just one-directional pest controllers.15Journal of Applied Entomology. Experimental assessment of trophic ecology in a generalist spider predator: Implications for biocontrol in Uruguayan crops
Feeding Wolf Spiders in Captivity
If you keep a wolf spider as a pet or are rearing them for research, feeding is straightforward but does require some attention. Commercially available crickets and fruit flies are the standard diet. For large species like Hogna, appropriately sized crickets work well. For smaller species, flightless fruit flies or pinhead crickets are better. Offering food every three to five days is a reasonable starting schedule for an adult, though you’ll want to adjust based on the spider’s behavior: a hungry spider will actively chase prey, while one that’s recently fed may ignore it entirely.
Water matters as much as food. A shallow dish or damp cotton ball gives the spider access to moisture. Dehydration can kill a wolf spider faster than starvation, and a well-hydrated spider can go considerably longer between meals. Temperature in the enclosure also matters for the reasons described earlier: a warmer spider has a faster metabolism and will need to eat more often. Room temperature is fine for most temperate species, but tropical species may need supplemental warmth to maintain normal feeding behavior.
Overfeeding is the most common mistake in captivity. In the wild, a wolf spider’s feeding rate is constrained by prey availability, the energy cost of hunting, and the competition from other predators. In a terrarium with crickets dropped in regularly, those constraints vanish. A captive spider with unlimited food access can become obese, with an abdomen so distended it risks bursting from a fall. Feeding conservatively and watching the spider’s abdomen size is the best guide. If the abdomen looks taut and round, skip a feeding or two.