Widow Spider, Black Widow, Brown Widow
Latrodectus sp.
Theridiidae (Cobweb Spiders), Order Araneae
Physical Description
Small spider with a distinctively bulbous, globose abdomen and a smaller cephalothorax. The body is glossy and smooth-textured.
Size Estimate
Typical body length 3-10mm; the specimen shown is small, possibly a juvenile or sub-adult.
Coloration & Markings
Dark brown to blackish base color. Most species in this genus feature a ventral red/orange hourglass, though only the dark dorsal side is visible here.
Web Type
Irregular, messy-looking 'cobweb' or tangle web consisting of very strong, sticky silk, often found in corners or crevices.
Eye Arrangement
8 eyes in two rows of four; however, they are not distinguishable in this low-resolution image.
Leg Characteristics
Thin, spindly legs; the fourth pair features a 'comb' of serrated bristles used for wrapping prey in silk.
Venom & Safety Information
Venom Information
Contains neurotoxic latrotoxins. Potent, but generally only delivered in small amounts during defensive bites.
Medical Significance
Medically significant. Bites can cause latrodectism (pain, muscle cramping, sweating). Seek medical evaluation if bitten, though deaths are extremely rare.
Safety Recommendations
Do not handle with bare hands. Use a jar and stiff paper for relocation. Wear gloves when cleaning out dark storage areas or garages.
Habitat & Behavior
Habitat & Range
Cosmopolitan distribution; found worldwide in temperate and tropical regions. Commonly nests in dark, undisturbed areas, sheds, or wall voids.
Behavior & Temperament
Reclusive and non-aggressive; they typically retreat into a corner or drop from the web when disturbed.
Diet & Prey
Generalist predators feeding on various insects, beetles, and other spiders that become entangled in their strong silk.
Seasonal Activity
Active year-round in warm climates; peak visibility and mating occur in late summer and autumn.
Description
A member of the renowned widow genus, these spiders are master architects of haphazard-looking but structurally superior tangle webs.
Key Features
Rounded, bulbous abdomen; dark glossy coloration; specialized silk-combing bristles on the hind legs.
Similar Species
Steatoda species ('False Widows') look similar but lack the red hourglass and have less potent venom.
Life Cycle
Females produce round, papery egg sacs. Spiderlings disperse via ballooning. Females can live up to 3 years.
Ecological Importance
Vital for controlling populations of pest insects like crickets and cockroaches near human structures.
Conservation Status
Not evaluated by IUCN; generally common and stable due to their adaptability to human environments.
Interesting Facts
Widow silk is one of the strongest biological materials known, often compared to the tensile strength of high-grade steel.
Photography Tips
Focus on the underside (ventrum) to check for an hourglass marking; use a macro lens and a diffused flash to manage the glossy reflections.
Identified: 2026-06-22T21:18:42.312766