Widow Spider, Button Spider
Latrodectus sp.
Theridiidae (Cobweb Spiders), Order Araneae
Physical Description
Rounded, bulbous abdomen characteristic of cobweb spiders paired with a smaller cephalothorax. The specimen appears curled or compressed, typical of a defensive posture or post-mortem state.
Size Estimate
Small to medium, approximately 5-10 mm body length, typical for a juvenile or male widow spider or a closely related theridiid.
Coloration & Markings
Dark brownish to black body with contrasting reddish-orange or yellowish markings visible on the ventral or dorsal side.
Web Type
Irregular tangle web, commonly known as a cobweb, constructed in dark, undisturbed areas.
Eye Arrangement
Eight small eyes arranged in two rows of four, typical of the Theridiidae family.
Leg Characteristics
Slender legs with subtle dark banding and combs of setae on the fourth tarsi, typical of cobweb spiders for manipulating silk.
Venom & Safety Information
Venom Information
Contains neurotoxins (latrotoxins) that affect the nervous system. Potency varies by exact species, with some being medically significant.
Medical Significance
Potentially medically significant depending on the exact species (e.g., Latrodectus mactans). Bites can cause severe muscle pain, cramping, and systemic symptoms, requiring medical evaluation.
Safety Recommendations
Wear gloves when cleaning dark, undisturbed areas. If found indoors, relocate safely using a container rather than handling directly.
Habitat & Behavior
Habitat & Range
Found globally in temperate and tropical regions, often inhabiting dark sheltered spots around human dwellings, garages, woodpiles, and debris.
Behavior & Temperament
Timid and non-aggressive, usually retreating when disturbed, though females defend egg sacs vigorously.
Diet & Prey
Insects and other arthropods caught in its sticky tangle web.
Seasonal Activity
Most active during warmer spring and summer months, seeking shelter indoors as temperatures drop in autumn.
Description
A small theridiid spider, likely a widow spider or close relative, showcasing the characteristic bulbous abdomen and tangled web-weaving habits of its family.
Key Features
Globular abdomen, comb-like setae on hind tarsi, and irregular tangle web structure.
Similar Species
False widow spiders (Steatoda species), which lack the potent neurotoxic venom and often feature different abdominal markings.
Life Cycle
Females produce spherical silk egg sacs containing hundreds of eggs. Spiderlings disperse via ballooning after hatching.
Ecological Importance
Acts as a natural predator controlling populations of various household and garden insects.
Conservation Status
Not evaluated by the IUCN; populations are robust and widespread.
Interesting Facts
Widow spiders are famous for extreme sexual dimorphism, where females are significantly larger than males.
Photography Tips
Use macro lenses with adequate natural lighting or a diffuser to capture clear details of markings and eye arrangement safely.
Identified: 2026-09-21T18:08:48.825269