White-banded Fishing Spider
Dolomedes albineus
Pisauridae (Nursery Web Spiders), Order Araneae. Key family characteristics include similar-sized claws, robust legs directed forward and sideways, and the carrying of egg sacs in the chelicerae until just before hatching.
Physical Description
Robust body with a broad, flat cephalothorax and an oval-shaped, slightly tapered abdomen. The body is densely covered in fine, velvety setae giving it a textured appearance. Females are notably larger than males.
Size Estimate
Body length ranges from 15 to 26 mm for females, with a leg span that can reach up to 70 to 80 mm, making this a substantial, large-bodied specimen likely approaching or at full adulthood.
Coloration & Markings
Mottled brown, gray, and black camouflage patterns featuring distinct wavy bands and chevrons along the abdomen and legs, allowing the spider to blend seamlessly against tree bark and weathered wood surfaces.
Web Type
Fishing spiders do not build webs to capture prey. Instead, they are active nocturnal or crepuscular hunters that roam free, though females construct a nursery web in vegetation when ready to lay eggs.
Eye Arrangement
Eight eyes arranged in two distinct curved rows of four, typical of pisaurids, with eyes being relatively equal in size compared to the disparate eye sizes found in wolf spiders.
Leg Characteristics
Long, robust legs held laterally in a sprawling crab-like posture, heavily banded with dark brown and light gray, equipped with strong spines and specialized scopulae for traversing both land and water surfaces.
Venom & Safety Information
Venom Information
Contains neurotoxic components adapted for subduing invertebrate prey and small vertebrates, but it is not specialized for human defense.
Medical Significance
Not medically significant. While capable of delivering a defensive bite if trapped against human skin, the effect is generally comparable to a mild wasp sting with localized pain and swelling that quickly subsides.
Safety Recommendations
No cause for alarm if found outdoors or on a deck. If relocation is necessary, gently guide the spider into a rigid container using a piece of cardstock and release it near a natural water source.
Habitat & Behavior
Habitat & Range
Found primarily in the southeastern and eastern United States. Prefers wooded areas near streams, swamps, ponds, and lakes, frequently resting on tree trunks, wooden fences, and docks.
Behavior & Temperament
Timid and fast-moving. When disturbed, they typically bolt rapidly toward shelter or dive beneath the water's surface rather than act aggressively. They are primarily nocturnal hunters.
Diet & Prey
Generalist predators consuming large insects, aquatic invertebrates, small fish, and occasionally tadpoles by detecting surface vibrations on water or ambushing prey on land.
Seasonal Activity
Most active during spring and summer months. Mating typically occurs in the warm season, and they overwinter under loose bark, in hollow logs, or beneath leaf litter.
Description
A magnificent large wandering spider, the fishing spider is a master of camouflage found clinging to vertical wooden structures and tree bark near water. With its sprawling legs and mottled earthy tones, it waits patiently for vibrations or actively stalks prey.
Key Features
Large size, sprawling lateral leg posture, mottled bark-like coloration, and absence of an orb web while resting on vertical wooden or tree surfaces near aquatic habitats.
Similar Species
Wolf Spiders (Lycosidae) and Dark Fishing Spider (Dolomedes tenebrosus). Wolf spiders can be distinguished by their prominent pair of large anterior median eyes.
Life Cycle
Females carry their spherical silk egg sacs in their jaws until late incubation, then construct a tent-like nursery web in foliage, guarding the emerging spiderlings through their early molting stages.
Ecological Importance
Acts as an effective apex predator among shoreline invertebrates and small vertebrates, helping regulate insect populations and serving as a food source for birds and amphibians.
Conservation Status
Not evaluated by the IUCN, but populations remain stable throughout its native range due to adaptability, though local habitats face pressure from shoreline development.
Interesting Facts
Fishing spiders can run across the surface of open water using surface tension and can even submerge themselves entirely beneath the water for several minutes to escape predators.
Photography Tips
Use a macro lens with a fast shutter speed to freeze potential movement. Approach slowly to avoid startling it into running, and photograph from a top-down or parallel angle to highlight the camouflage markings.
Identified: 2026-09-21T15:16:28.020220