Arizona’s desert climate creates perfect conditions for some impressively large spiders that regularly startle residents and visitors alike. Walking into your garage only to find a palm-sized tarantula or discovering a hand-width crab spider on your ceiling can trigger instant alarm, but most encounters with Arizona’s big spiders end harmlessly.
The state hosts at least 30 different tarantula species alone, plus several other large arachnids including wolf spiders, huntsman spiders, and striking garden spiders.
Understanding which giant spiders call Arizona home helps you distinguish truly dangerous species from those that simply look intimidating, respond appropriately when you encounter them, and appreciate their role in controlling Arizona’s insect populations throughout the hot desert months.
1. Arizona Blond Tarantula
The Arizona blond tarantula (Aphonopelma chalcodes) stands as one of the state’s most recognizable large spiders and perhaps its most beautiful tarantula species. Females can achieve body lengths of 2-2.5 inches with leg spans extending to 6 inches, making them substantial arachnids by any measure. Despite their size and somewhat fearsome appearance, these tarantulas demonstrate remarkably docile temperaments toward humans.
You’ll identify this species by its striking coloration: a light tan to golden-blond carapace contrasts beautifully with legs covered in dense black or dark brown hair. The abdomen displays a darker brown to black coloration, also covered in hair. This distinctive blonde-and-black combination makes identification straightforward compared to other Arizona tarantulas. Younger specimens may show more uniform coloration that becomes more contrasting as they mature.
These tarantulas inhabit desert and grassland regions throughout southern and central Arizona, with their range extending into Sonora, Mexico. They thrive in the Sonoran Desert ecosystem where they construct silk-lined burrows in sandy or rocky soil. You’ll find them in various elevations from low desert valleys to higher elevations approaching 5,000 feet, wherever suitable substrate allows burrow construction.
Pro Tip: Arizona blond tarantulas can live 20-30 years in the wild, with females outliving males by decades. Males typically die within months of their final molt and successful mating, while females continue thriving for many years afterward.
Arizona blond tarantulas spend most of their lives in burrows that they either dig themselves or modify from existing holes. These burrows can extend 12-18 inches underground and provide essential protection from Arizona’s extreme temperature swings and low humidity. The spiders line their burrows with silk and typically construct them beneath rocks, vegetation, or other shelter that provides additional shade.
As nocturnal hunters, these tarantulas emerge from their burrows after sunset to search for prey near the entrance. They don’t wander far from their burrows unless displaced. Their hunting strategy involves ambush rather than pursuit—they wait for insects to pass within striking distance, then capture them with surprising speed. Their diet consists primarily of insects including crickets, grasshoppers, beetles, and moths.
During late summer and fall, male Arizona blond tarantulas leave their burrows to search for females. This mating migration makes them much more visible and accounts for most human encounters with these spiders. Males can be seen crossing roads, sidewalks, and yards during their search, particularly around sunset when temperatures cool but visibility remains adequate.
If you encounter an Arizona blond tarantula, it will likely attempt to flee rather than confront you. When cornered or threatened, they may rear up on their hind legs in a defensive display and expose their fangs. They can also use their back legs to flick urticating hairs from their abdomen toward threats. These barbed hairs cause skin irritation, itching, and significant discomfort if they contact eyes or mucous membranes.
A bite from this tarantula, while painful due to large fang size, poses minimal danger to most people. You’ll experience localized pain, swelling, and redness similar to a bee sting that typically resolves within a few days. However, individuals with allergies to spider venom should seek medical attention, as allergic reactions can produce more severe symptoms requiring intervention.
2. Desert Tarantula
Desert tarantulas (Aphonopelma spp.) represent a diverse group of tarantula species adapted to Arizona’s arid environments. The genus Aphonopelma includes approximately 30 species in Arizona alone, making precise identification to species level challenging without expert examination. These spiders typically measure 1.5-2.5 inches in body length with leg spans reaching 4-6 inches, placing them among Arizona’s most substantial spiders.
You can identify desert tarantulas by their overall brown to tan coloration with dense hair coverage across the body and legs. Different species show subtle variations in color from light tan to nearly black, often with contrasting leg and body colors. The abdomen appears plump and rounded, covered in uniform hair. Unlike the distinctive blonde carapace of Arizona blond tarantulas, desert tarantulas typically display more uniform brown tones throughout.
Important Note: Arizona hosts more tarantula diversity than almost any other state. Species like the western desert tarantula (Aphonopelma chalcodes), Grand Canyon black tarantula (Aphonopelma marxi), and numerous undescribed species all fall under the “desert tarantula” umbrella. Many look similar to casual observers but occupy different elevation ranges and habitat types.
These tarantulas inhabit various desert ecosystems across Arizona including the Sonoran Desert, Mojave Desert transitional zones, and desert grasslands. They adapt to diverse soil types from sandy washes to rocky hillsides, wherever they can construct suitable burrows. Some species prefer lower desert elevations while others thrive in higher elevation grasslands, creating a combined range that covers much of the state.
Desert tarantulas construct burrows similar to other tarantula species—silk-lined tunnels extending underground that provide shelter from temperature extremes, predators, and desiccation. The burrow entrance may be partially closed with silk and debris or left open depending on species and environmental conditions. Burrow depth varies with soil type and moisture levels but typically reaches 8-16 inches.
These spiders are obligate burrowers, meaning they depend entirely on their burrows for survival in Arizona’s harsh desert climate. They emerge at night to hunt near the burrow entrance, rarely wandering more than a few feet from safety. Their diet consists of ground-dwelling insects, other spiders, and occasionally small vertebrates like lizards that venture too close to the burrow.
Male desert tarantulas undertake mating migrations during late summer and early fall, typically triggered by monsoon rains that soften soil and moderate temperatures. During these migrations, males may travel considerable distances in search of females’ burrows, making them vulnerable to predators, vehicles, and startled homeowners. This is when you’re most likely to encounter desert tarantulas in yards, garages, or crossing roads.
Key Insight: The tarantula hawk wasp (Pepsis formosa) represents desert tarantulas’ most formidable natural enemy. These large wasps hunt tarantulas, sting them to paralysis, and lay eggs on the living but immobilized spider, which then serves as food for the developing wasp larvae.
Female desert tarantulas remain in or near their burrows throughout their lives. After mating, they produce egg sacs containing 100-1,000 eggs depending on species and female size. The female guards these eggs within her burrow for several weeks until tiny spiderlings emerge. Mortality rates are extremely high during the spiderlings’ first year as they disperse and establish their own burrows.
Desert tarantulas are generally docile toward humans and prefer to flee when disturbed. They will bite if grabbed or cornered, delivering painful bites due to their substantial fang size. Bite symptoms include localized pain, swelling, and redness that typically resolve within several days. The venom is not considered medically significant for healthy adults, though allergic individuals should seek medical attention if bitten.
3. Texas Brown Tarantula
The Texas brown tarantula (Aphonopelma hentzi) extends its range into Arizona despite its name, making it one of several tarantula species you might encounter in the state’s southern and eastern regions. This substantial spider reaches body lengths of 1.5-2 inches with leg spans extending to 5-6 inches. Females grow larger than males and possess heavier, more robust builds.
You’ll identify this species by its chocolate brown to dark brown legs and abdomen contrasting with a lighter brown to tan carapace. The entire body is covered in dense hair, giving it the characteristic fuzzy appearance of tarantulas. The carapace often shows a reddish-brown tint that helps distinguish it from other similar species. Males typically display more slender builds and longer legs relative to body size compared to females.
This tarantula inhabits grasslands, desert scrub, and mixed desert-grassland ecosystems in southern and eastern Arizona. While most abundant in Texas, Oklahoma, and Kansas, its range extends into Arizona’s southeastern counties where habitat conditions suit its preferences. They favor areas with sufficient moisture to support grassier vegetation compared to the sparse vegetation of the lower Sonoran Desert.
Texas brown tarantulas construct typical tarantula burrows—silk-lined tunnels in soil that provide shelter and hunting stations. They position burrows beneath rocks, logs, or vegetation that offers additional protection from weather and predators. The burrows typically extend 10-18 inches deep depending on soil type and drainage.
As with other tarantulas, these spiders are primarily nocturnal hunters that emerge from burrows after dark to capture prey near the entrance. They rely on ambush tactics rather than pursuit, detecting prey through ground vibrations transmitted through sensory hairs on their legs. Their diet consists mainly of insects but can include small vertebrates when opportunities arise.
Male Texas brown tarantulas become active wanderers during mating season in late summer and fall, particularly after rain events. They search for females’ burrows, often crossing roads and entering human-occupied areas during their quest. This seasonal activity makes them much more visible than the stay-at-home females. Males die shortly after mating, while females may live 20-25 years.
These tarantulas demonstrate docile temperaments and rarely bite unless directly handled or severely provoked. When threatened, they first attempt to flee. If escape is impossible, they may rear up in a defensive posture and display their fangs. They can also flick urticating hairs from their abdomen using their back legs—these barbed hairs cause itching and irritation if they contact skin, and severe discomfort if they reach eyes or airways.
A bite from a Texas brown tarantula causes pain, swelling, and redness at the bite site but is not considered medically dangerous to healthy adults. The pain has been compared to a bee or wasp sting. Symptoms typically resolve within a few days without medical intervention. However, the puncture wounds from large fangs can become infected if not properly cleaned, and individuals allergic to spider venom should seek medical evaluation if bitten.
4. Carolina Wolf Spider
The Carolina wolf spider (Hogna carolinensis) holds the distinction of being North America’s largest wolf spider species and one of Arizona’s most impressive non-tarantula spiders. Females achieve body lengths up to 1.4 inches with leg spans reaching 4 inches, while males measure slightly smaller. Their size combined with their active hunting behavior makes them memorable encounters for Arizona residents.
You can identify this species by its mottled brown and gray coloration with darker brown patterns running down the carapace and abdomen. The peachy or orange tint on the front of their mouthparts (chelicerae) provides a distinctive identification clue. Males sometimes display orange coloration along the sides of their abdomen. Their most recognizable feature is their eye arrangement: eight eyes in three rows, with two large prominent eyes facing forward that reflect light brilliantly at night.
Common Mistake: People often confuse Carolina wolf spiders with brown recluse spiders or even tarantulas. However, brown recluse spiders are much smaller with six eyes arranged in pairs, while tarantulas are hairier with thicker bodies. Wolf spiders have the distinctive three-row eye pattern and relatively long, agile legs built for running.
These adaptable spiders inhabit various environments throughout Arizona including the Arizona Upland region of the Sonoran Desert, desert grasslands, and transitional zones between desert and higher elevation habitats. They construct burrows in sandy or rocky soil, often beneath rocks, vegetation, or other cover that provides shade and camouflage. Their burrows typically extend 6-12 inches deep.
Carolina wolf spiders are primarily nocturnal ground hunters that spend daylight hours concealed in their burrows or beneath debris. They emerge after sunset to actively hunt prey using their exceptional eyesight and impressive speed. Unlike web-building spiders, wolf spiders pursue and capture prey through active hunting—chasing down insects with sudden bursts of speed that can startle observers.
The hunting strategy of wolf spiders relies heavily on vision rather than web vibrations. Their large forward-facing eyes provide excellent depth perception and motion detection, allowing them to spot prey from considerable distances. They can detect movement from several feet away and quickly close the distance to capture insects before they escape. Their diet includes crickets, grasshoppers, beetles, and other ground-dwelling arthropods common in Arizona ecosystems.
Female Carolina wolf spiders exhibit fascinating maternal care that distinguishes them from most other spiders. After mating, they produce a spherical egg sac that they attach to their spinnerets and carry everywhere they go. You’ll often see female wolf spiders dragging these egg sacs behind them as they hunt. When the spiderlings emerge, they climb onto their mother’s back where dozens of tiny spiders remain for 5-7 days before dispersing.
These spiders pose minimal threat to humans despite their intimidating size. They’re non-aggressive and prefer to flee when disturbed. A bite from a Carolina wolf spider can be painful due to the spider’s size and relatively large fangs, but symptoms typically mirror those of a bee or wasp sting—localized pain, redness, and swelling that resolves within 24-48 hours. The venom is not medically significant for humans, though it effectively subdues insect prey.
5. Giant Crab Spider
The giant crab spider (Olios giganteus), also called the golden huntsman spider, represents one of Arizona’s most unusual large spiders. This species measures about 0.8 inches in body length with leg spans reaching 2-3 inches, though their unique leg orientation makes them appear even larger. Their distinctive appearance and behavior make them unmistakable once you know what to look for.
You’ll identify this spider by its light brown to tan body covered in short hairs, with leg tips darker than the base. A thin black arrow or stripe pattern runs down the abdomen. Their most distinctive feature involves their leg arrangement—the legs extend at approximately 90-degree angles from the body, allowing them to orient horizontally and move sideways very quickly, exactly like a crab. This crab-like stance and movement gave them their common name.
Giant crab spiders inhabit various environments throughout Arizona and northern Mexico including dead saguaro cacti, rocky outcrops, building exteriors, and homes. They’re particularly common in the Sonoran Desert where they find abundant vertical surfaces for hunting. Their flattened bodies allow them to squeeze into remarkably narrow cracks and crevices in rock faces, tree bark, or building materials where they hide during daylight.
Pro Tip: Giant crab spiders are most active during Arizona’s warm months from late spring through early fall. They become more visible during monsoon season when insects are most abundant and temperatures moderate slightly in the evenings when these spiders hunt.
These spiders are active hunters that don’t build webs to capture prey. Instead, they wander across vertical surfaces at night searching for insects. During the day they hide in cracks, behind bark, or in other narrow spaces where their flattened body shape allows them to squeeze into hiding spots barely thicker than a credit card. This adaptation makes them nearly invisible when pressed against appropriately colored surfaces.
The hunting behavior of giant crab spiders relies on speed and ambush tactics. They wait motionless on flat surfaces—walls, ceilings, tree trunks—until prey comes within striking distance. When an insect approaches, they attack with remarkable speed, using their curved, needle-like fangs to capture and subdue prey. Their excellent grip allows them to hunt on smooth vertical surfaces including glass and painted walls.
Female giant crab spiders produce large egg sacs that they guard fiercely. Unlike many spider species that abandon their eggs after laying, female giant crab spiders remain with their egg sacs, defending them from potential threats. This is one of the few times these otherwise docile spiders may display defensive behavior if you disturb their egg-guarding location.
Despite their size and speed, giant crab spiders are surprisingly docile toward humans and generally flee when disturbed. They can bite if grabbed or trapped, and reports indicate the bite is painful, though the venom is not dangerous to humans. Bite symptoms include localized pain, redness, and swelling similar to a bee sting that typically resolves within 24-48 hours. These spiders are far more interested in escaping than confronting humans.
6. Huntsman Spider
The huntsman spider (Heteropoda venatoria), sometimes called the pantropical huntsman or brown huntsman, is actually a non-native species that has established populations in Arizona. This large spider measures approximately 1 inch in body length with leg spans reaching 3-4 inches, making it one of the more impressive spiders you might encounter indoors. Males possess longer, more slender legs than females.
You can identify huntsman spiders by their overall light to medium brown coloration with subtle darker markings on the body. Males often display a dark stripe running down the abdomen. Their legs are long and slender relative to body size, extending in a forward-pointing pattern that gives them their characteristic flattened appearance. Unlike wolf spiders, which hold their bodies higher off the ground, huntsman spiders keep their bodies close to surfaces.
Important Note: Huntsman spiders are sometimes confused with brown recluse spiders due to similar brown coloration. However, huntsman spiders are much larger, have eight eyes (brown recluse have six), lack the distinctive violin marking, and display different leg proportions and body shapes.
These spiders originated in tropical Asia but have spread globally through human commerce. In Arizona, they’ve established populations in urban and suburban areas, particularly in and around buildings. They prefer indoor environments where they find shelter, stable temperatures, and abundant insect prey. You’ll commonly find them in garages, sheds, storage areas, and occasionally inside homes.
Huntsman spiders are active hunters that don’t build webs to capture prey. They’re primarily nocturnal, hiding during daylight in narrow spaces behind furniture, inside cabinets, or in other dark locations. At night they emerge to actively hunt insects across walls, ceilings, and floors. Their flattened body shape allows them to access narrow hiding spaces that would be impossible for similarly-sized but more rounded spiders.
The hunting strategy of huntsman spiders combines stealth, speed, and excellent vision. They move slowly and deliberately when stalking prey, then attack with sudden bursts of speed when within striking distance. Their speed can be startling to observers who suddenly see a large spider dash across a wall or ceiling. They feed on various household insects including cockroaches, silverfish, crickets, and moths.
Female huntsman spiders produce flat, disc-shaped egg sacs that they guard intensely. Unlike wolf spiders that carry their egg sacs, huntsman females remain stationary with their egg sacs, standing guard until the spiderlings emerge. During this guarding period, females may be reluctant to flee and could display defensive behavior if their egg sac is threatened.
Huntsman spiders are generally docile and non-aggressive toward humans despite their size and speed. They prefer to flee when disturbed and will dash away quickly if approached. Bites are rare and only occur if the spider is grabbed or trapped against skin. Bite symptoms are minor—localized pain, slight redness, and minimal swelling that typically resolves within hours. The venom is not medically significant to humans.
7. Black and Yellow Garden Spider
The black and yellow garden spider (Argiope aurantia) stands as one of Arizona’s most visually striking large spiders, instantly recognizable by its bold coloration and impressive web architecture. Females measure 0.75-1.1 inches in body length with leg spans reaching 2-3 inches, while males are much smaller at about 0.25 inches. This dramatic size difference between sexes is typical of orb-weaver spiders.
You’ll immediately identify this species by its stunning color pattern: a black body with bright yellow or orange markings arranged in bands across the abdomen. The legs display alternating black and yellow or orange banding creating a striking appearance. The carapace is covered with fine silvery hairs that shimmer in sunlight. This bold coloration serves as warning coloration, though these spiders pose minimal actual threat to humans.
These spiders thrive in open, sunny areas throughout Arizona where they can construct their large orb webs. You’ll find them in gardens, desert landscaping, field edges, and along borders between developed areas and natural spaces. They prefer locations with supporting structures for web attachment such as shrubs, tall plants, fence posts, or building overhangs. Webs are typically positioned 2-8 feet above ground.
Black and yellow garden spiders construct remarkable orb webs that can span up to 2 feet in diameter. These architectural marvels feature a distinctive zigzag pattern called a stabilimentum running vertically through the web’s center. The stabilimentum’s purpose remains debated—theories include prey attraction through UV reflection, predator warning, web stabilization, or spider camouflage. Regardless of its function, it makes the web unmistakable.
Key Insight: These spiders typically build new webs each evening, consuming the old web to recycle silk proteins. The construction process demonstrates remarkable precision as the spider works entirely by touch, creating geometrically perfect spirals in near-total darkness.
The spider positions itself head-down in the web’s center, waiting for flying insects to become ensnared in the sticky spiral threads. When prey strikes the web, the spider quickly assesses the capture based on web vibrations. Small, harmless prey receives immediate attention—the spider rushes over, bites to inject venom, and wraps it in silk. Large or potentially dangerous prey like wasps may be initially bound with additional silk before the spider approaches for the killing bite.
Their diet includes various flying insects abundant in Arizona including grasshoppers, butterflies, moths, flies, bees, and wasps. Garden spiders in desert landscaping provide significant pest control benefits by capturing substantial numbers of insects daily during their active season from spring through fall.
Female garden spiders exhibit interesting reproductive behavior. After mating in late summer or fall, they produce 1-4 large, brown, papery egg sacs that each contain 400-1,400 eggs. The female attaches these egg sacs near her web and guards them until Arizona’s first freeze or extreme heat kills her. The eggs overwinter in the protected sacs, and tiny spiderlings emerge the following spring when temperatures warm.
Black and yellow garden spiders are completely harmless to humans despite their large size and bold appearance. They’re non-aggressive and will drop from their web or retreat when disturbed. Bites are extremely rare and only occur if the spider is directly handled or trapped against skin. Bite symptoms are mild—comparable to a mosquito bite with slight redness and localized discomfort that resolves within hours.
8. Banded Garden Spider
The banded garden spider (Argiope trifasciata) closely resembles its black and yellow cousin but with distinctive silver and gold banding that gives it its common name. Females measure 0.6-1 inch in body length with leg spans reaching 2-2.5 inches, making them slightly smaller than black and yellow garden spiders. Like other orb-weavers, males are much smaller and less conspicuous than females.
You can identify this species by the silver or white bands alternating with yellow or gold bands across the abdomen, creating a striped pattern rather than the spotted pattern of black and yellow garden spiders. The legs show similar banding in black and lighter colors. The carapace is covered with silvery hairs that create a shimmering effect in sunlight. The overall appearance is more subdued and geometric compared to the bold contrast of black and yellow garden spiders.
Common Mistake: Both banded and black and yellow garden spiders can occur in the same Arizona habitats, sometimes building webs near each other. The primary distinguishing feature is the banded/striped pattern versus the spotted pattern, though individual variation and lighting conditions can sometimes make identification challenging.
Banded garden spiders inhabit similar environments as their close relatives throughout Arizona: gardens, desert landscaping, field edges, and areas with mixed vegetation. They prefer open, sunny locations with vegetation or structures providing web anchor points. In Arizona’s desert regions, they’re particularly common around irrigated landscaping, agricultural edges, and riparian areas where moisture supports denser vegetation and more abundant flying insects.
Their orb webs measure 12-18 inches in diameter, smaller than those of black and yellow garden spiders but equally intricate. The web features the characteristic spiral design with a zigzag stabilimentum, though the stabilimentum is sometimes less pronounced in banded garden spider webs. These spiders construct new webs each evening, positioning themselves head-down in the web’s center to wait for prey.
The hunting strategy relies entirely on the web to capture flying insects. When prey becomes entangled in sticky spiral threads, the spider quickly responds based on web vibration patterns. Their response varies with prey size and potential danger—small harmless insects receive immediate attention while larger or stinging insects may be carefully bound with additional silk before the spider approaches close enough to bite.
These spiders feed on flying insects including grasshoppers, flies, small beetles, moths, butterflies, and bees—all abundant in Arizona during warm months when these spiders are active. Their presence in gardens and agricultural areas provides beneficial pest control by capturing insects that might otherwise damage plants.
Female banded garden spiders produce egg sacs similar to other Argiope species. After mating, the female constructs one to several brown, papery egg sacs that she attaches in vegetation near her web. Each egg sac contains several hundred eggs. The female guards these until she dies, while the eggs overwinter to hatch when spring temperatures warm and insect populations increase.
Banded garden spiders are completely harmless to humans and pets. They’re non-aggressive and prefer to avoid confrontation. When threatened, they may vibrate their web rapidly in a behavior called “web bouncing” to appear larger and more intimidating, or they’ll simply drop from the web on a silk thread to escape. Bites are exceptionally rare and cause only minor, temporary discomfort comparable to a mosquito bite.
9. Desert Fishing Spider
Desert fishing spiders (Dolomedes spp.) represent a rare but fascinating group of large spiders occasionally found in Arizona’s limited water sources. While fishing spiders are typically associated with wetter regions, a few species have adapted to Arizona’s desert aquatic habitats. These spiders measure 0.75-1 inch in body length with leg spans reaching 3-3.5 inches for females, with males measuring approximately half that size.
You can identify fishing spiders by their robust, somewhat flattened bodies displaying brownish-gray to tan coloration with darker markings. The legs show banding patterns in brown and tan, and the body often has lighter stripes running along each side. Their overall appearance helps them blend with rocks, vegetation, and debris near water. The leg arrangement differs from wolf spiders—fishing spiders hold their legs more forward and splayed, adapted for detecting water surface vibrations.
Pro Tip: True fishing spiders are uncommon in Arizona due to limited permanent water sources. You’re most likely to find them near reliable water bodies including springs, permanent streams, pond edges, and well-maintained water features in landscaping. Their presence indicates consistent water availability.
These spiders inhabit the limited aquatic and semi-aquatic environments in Arizona including riparian zones along permanent streams, spring-fed wetlands, pond margins, and occasionally large artificial water features. Unlike most Arizona spiders adapted to arid conditions, fishing spiders require proximity to water throughout their lives. This habitat restriction makes them much less common than other large Arizona spiders.
What distinguishes fishing spiders from other large Arizona spiders is their remarkable aquatic abilities. They can run across water surfaces using surface tension, supported by hydrophobic hairs on their legs that repel water. They can also dive beneath the surface to escape predators or pursue aquatic prey, remaining submerged for extended periods by trapping air bubbles against their bodies with specialized hairs.
The hunting behavior of fishing spiders involves detecting water surface vibrations to locate prey. They typically rest with front legs touching the water, waiting for ripples that indicate potential food. When prey is detected—aquatic insects, tadpoles, or small fish—they dash across the water at impressive speeds to capture it. They can also hunt terrestrial insects that venture too close to the water’s edge.
Female fishing spiders construct distinctive nursery webs to protect their eggs. After producing an egg sac, the female carries it in her chelicerae (jaws) for about two weeks. As the eggs near hatching, she builds a large, tent-like silk structure in vegetation near water where she deposits the egg sac. She guards this nursery until the spiderlings emerge and disperse into the surrounding habitat.
Despite their fierce hunting abilities and intimidating size, fishing spiders are extremely skittish around humans. They typically flee at the slightest disturbance, either running to cover or diving beneath the water. Bites are exceptionally rare and only occur if the spider is directly handled or trapped.
Bite symptoms resemble bee or wasp stings: pain, redness, and localized swelling that typically resolves within 24-48 hours. The venom is not medically significant to humans.
