Triangulate Cobweb Spiders are not afraid to take down an insect much larger than itself, letting their well-constructed webs do the hard work.
The triangular pattern on the abdomen helped name this spider. It is a common house spider, hiding in dark corners of rooms or in out-buildings like sheds. They are believed to have poor eyesight, depending almost completely on feeling the vibrations from the web in order to find the prey entangled in it.
Triangulate Cobweb Spiders feed on a variety of insects including other spiders like the Brown Recluse. They are not known to be aggressive toward people and, possibly due to their tiny size, their venom is not life-threatening to people like that of the potential meals it eats. Like most Orb Weaver spiders, it rebuilds all or most of its web daily. A sturdy, well-built web in spider silk means the Triangulate Orb Weaver need only wait for a meal to wander into it. Once properly ensnared, the spider can feed on insects and arachnids much larger than itself with little fear of harm.
Scientific Name: Steatoda triangulosa
Other Name(s): Triangulate Bud Spider
Size (Adult; Length): 3mm to 6mm (0.12in to 0.23in)
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Legs: Spiders have four pairs of legs and these are attached to the cephalothorax.
Pedipalps: Small appendages near the mouth used as taste and smell organs.
Cephalothorax: Contains eyes, head, mouthparts, and legs.
Abdomen: Contains various organs related to digestion, reproduction, and web-making.
Spinnerets: Used in the production of spider silk for fashioning webs or catching prey.
NOTE: Unlike insects, spiders have both an endoskeleton (internal) and exoskeleton (external).