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Taxonomy
Kingdom	Animalia
Division	Arthropoda
Class	Arachnida
Order	Araneae
Family	Agelenidae
Genus	Tegenaria
Species	T. domestica

Barn Spider Basics

Araneus Cavaticus

Range and Habitat

These spiders are mainly distributed across the United States and Canada, particularly in the northeastern region. They enjoy dwelling in:

• Barns
• Sheds
• Porches
• Other man-made structures

Physical Appearance

A barn spider exhibits a unique appearance, characterized by:

• Grey, yellow, or brown coloration
• Black and white markings
• An overall orb-weaver body shape

Size and Sexual Dimorphism

Barn spiders exhibit sexual dimorphism, meaning the males and females differ in size:

• Females: 7.5 to 11.5 millimeters
• Males: 6 to 9 millimeters

Comparison of Barn Spider Size by Gender

Poor Eyesight and Sensing Vibrations

Despite being predators, barn spiders have poor eyesight.

To compensate, they rely on sensing vibrations through their webs. This helps them:

• Detect trapped prey
• Identify potential threats
• Monitor the condition of their web

Nocturnal Activities

Barn spiders are mostly nocturnal, which means they are most active during the night. Below is a comparison of their day and night activities:

Spiderlings

Upon hatching, the spiderlings, which are tiny replicas of the adult spiders, emerge from the egg sacs. They:

• Go through several molting stages to grow
• Disperse by ballooning, where they travel through the air on a strand of silk

Lifespan

Barn Spiders have a relatively short lifespan. Here are some quick facts about their lifespans:

Spiders in Hawaii: 11 of The Scariest & Most Common Species

Hawaii is a bucket-list destination for many, offering Jurassic Park-style scenery and irresistible island escapes. But like many tropical destinations, the archipelago is home to its fair share of critters and creepy crawlies. Spiders in Hawaii come in all shapes and sizes, so arachnophobes beware!

Due to Hawaii’s unique geographical position, far-flung in the Pacific Ocean, there are lots of species that are native to the island. Add to this the lush rainforests and breathtaking natural landscapes that make the perfect habitat for our eight-legged friends, and you’ll understand why so many species thrive here.

Despite this, serious or life-threatening spider bites are still incredibly on these islands, so don’t let the thought of them put you off visiting. However, if you are planning a trip to Hawaii, it can be helpful to know some of the more dangerous species to keep an eye out for, just in case. So, here are 11 scary species of spiders in Hawaii…

Table of Contents

Spiny-Backed orb weaver

This unusual looking arachnid has a hard, shell-like abdomen with six prominent spines, and is native to a range of tropical and subtropical regions. It can be white, orange, or yellow, with red markings and short black legs. You’ll usually find it in nature, preferring to reside in forests or plant-filled gardens than in urban spaces and inside the home. It spins round webs between trees to capture its prey, which usually consists of pests such as beetles, moths, mosquitoes, and whiteflies. They rarely venture indoors and pose no risk to humans at all.