Is it poisonous?

Discovering the Venomous Spiders of Belgium: Species, Behavior, and Local Risks



Belgium is home to several species of venomous spiders. These creatures, although feared by many, play an important role in the ecosystem. This article aims to provide information about the different venomous spiders found in Belgium, their behavior, and the local risks associated with them.

1. Species of Venomous Spiders in Belgium

Belgium is known to have three main species of venomous spiders:

  • Latrodectus tredecimguttatus: Also known as the Mediterranean black widow, this spider has a distinctive red hourglass-shaped marking on its abdomen.
  • Steatoda paykulliana: Commonly known as the red-legged widow, this spider has a black body with red legs.
  • Zygiella x-notata: Although not as venomous as the previous two species, this spider can still cause local irritation and allergic reactions.

2. Behavior of Venomous Spiders

Venomous spiders in Belgium typically inhabit dark, sheltered areas such as woodpiles, sheds, and caves. They are primarily nocturnal and use their venom to immobilize their prey. These spiders are not aggressive and will only bite as a last resort when threatened.

3. Local Risks and Safety Precautions

While the venomous spiders in Belgium pose a risk to humans, actual bites are rare. Most encounters occur when the spiders feel cornered or threatened. However, it is important to take precautions and be aware of the following:

  • Wear protective clothing and gloves when working in areas where spiders may be present.
  • Shake out shoes and clothing before putting them on, especially if they have been left outside.
  • Keep living spaces clean and clutter-free to reduce hiding places for spiders.


Understanding the different species of venomous spiders in Belgium, their behavior, and the local risks associated with them is essential for promoting public safety and dispelling unnecessary fears. By taking appropriate precautions and being aware of their presence, humans can coexist with these fascinating creatures without incident.

Frequently Asked Questions (FAQs)

Q: Are all spiders in Belgium venomous?

A: No, only certain species of spiders in Belgium are venomous. The three main venomous species are the Latrodectus tredecimguttatus, Steatoda paykulliana, and Zygiella x-notata.

Q: What should I do if I am bitten by a venomous spider?

A: If you are bitten by a venomous spider, it is important to seek medical attention immediately. Apply a cold compress to the bite area and try to capture the spider for identification, if possible.

Q: Can venomous spider bites cause death?

A: While venomous spider bites can be dangerous, especially for individuals who are allergic, deaths from spider bites are extremely rare. Most bites result in localized pain and discomfort that can be treated with appropriate medical care.

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