Spiders

Professional Spider Exterminator – Calgary – Spider Treatment Services

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Pest Pro Exterminator – Spider Removal – Serving Calgary & Surrounding Areas

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Common spiders in Calgary include several species, many That's a great follow-up! Calgary and the surrounding areas in Alberta are home to several fascinating and common spider species.

Here are the facts about some of the most frequently encountered spiders in the region, including the one that requires the most caution:

1. The Wolf Spider (The Hunter)

• Appearance: They are one of the most visible and often feared spiders due to their large size (up to 35 mm, including legs) and hairy appearance. They are typically brown, grey, or black with darker markings for camouflage.

• Behavior: Unlike many spiders, Wolf Spiders do not spin webs to catch prey. They are active hunters (hence the name "wolf") that stalk and pounce on their prey using their keen eyesight and speed.

• Location: They are ground-dwelling hunters found outdoors in gardens, woodpiles, and leaf litter. They often come indoors, especially in the fall, seeking warmer shelter in basements, garages, and window frames.

• Danger: They are not aggressive and will only bite if provoked, handled, or accidentally trapped against the skin. Their bite is venomous but not lethal and is usually compared to a bee sting, causing mild pain and swelling.

2. The Cellar Spider / Daddy Long-Legs (The Corner Dweller)

• Appearance: Known for their extremely long, thin legs and small, often pale or yellowish body. They are often mistaken for the Harvestman (which is not a spider).

• Behavior: They build messy, irregular webs in dark, damp, and undisturbed corners, most often in basements, cellars, and crawlspaces. They often hang upside down in their webs.

• Location: Primarily indoors in protected, high-humidity areas.

• Danger: Completely harmless to humans. They are actually beneficial as they sometimes prey on other spiders, including the occasional Black Widow.

3. The Orb Weaver (The Web Architect)

• Appearance: These spiders often have large, rounded abdomens that may be brightly coloured or patterned. They range widely in size and colour (e.g., Cross Spider, Marbled Orb Weaver).

• Behavior: They are famous for spinning the large, classic, circular, wheel-shaped webs you see strung between branches, porch railings, and fences. They sit in the center of the web waiting for flying insects.

• Location: Mostly found outdoors in gardens, meadows, and around the exterior of homes, often near outdoor lights.

• Danger: Not considered dangerous or aggressive. They are important for controlling flying insect populations.

4. The Black Widow Spider (The Medically Significant One)

• Appearance: The female is unmistakable: glossy jet black with a distinct red or orange hourglass-shaped marking on the underside of her globular abdomen. Females are about 13 mm long (not including legs).

• Behavior: They build chaotic, irregular webs usually low to the ground in dark, secluded, and undisturbed places. They are shy and reclusive and only bite when defending their egg sacs or when trapped.

• Location: While rare in Calgary, they are found in the warmer, southern regions of Alberta. Indoors, they may be found in woodpiles, sheds, under rocks, and in unused corners of garages and basements.

• Danger: The female's bite is medically significant because her venom is a neurotoxin. Symptoms can include severe muscle cramps, pain, and nausea. Immediate medical attention is necessary if you suspect a Black Widow bite.