The False Widow Spider, also known as Steatoda nobilis, is a species of spider that has gained significant attention in recent years due to its resemblance to the Black Widow Spider and its potential to inflict painful bites. Native to the Canary Islands and Madeira, this spider has been introduced to other parts of the world, including the United Kingdom, Ireland, and the southwestern United States, through human activity.
Physical Characteristics

The False Widow Spider is characterized by its dark brown or black body, which can grow up to 10 millimeters in length, with a distinctive orange or reddish mark on its abdomen. The spider’s body shape is more rounded than that of the Black Widow Spider, and its legs are longer and thinner. The False Widow Spider also has a distinctive pattern of white or yellowish markings on its abdomen, which can help distinguish it from other similar-looking species.
Web-Spinning Behavior
False Widow Spiders are known to spin irregular, messy webs in dark, undisturbed areas, such as basements, attics, and outdoor sheds. These webs are typically smaller than those of other spider species and are used to catch small insects and other arthropods. The spider’s web-spinning behavior is an important aspect of its ecology, as it allows the spider to capture prey and protect itself from predators.
| Characteristics | Description |
|---|---|
| Body Length | Up to 10 millimeters |
| Body Color | Dark brown or black |
| Abdomen Markings | Orange or reddish mark |
| Leg Length | Longer and thinner than Black Widow Spider |
| Web Shape | Irregular, messy |

Key Points
- The False Widow Spider is a species of spider that has been introduced to new regions through human activity.
- The spider's dark brown or black body and distinctive orange or reddish mark on its abdomen can help identify it.
- False Widow Spiders spin irregular, messy webs in dark, undisturbed areas to catch prey and protect themselves.
- The spider's bite can be painful, but it is not typically life-threatening, and most people experience only minor symptoms.
- It's crucial to exercise caution when dealing with spiders, as some species can inflict painful bites or cause allergic reactions.
Habitat and Distribution

False Widow Spiders are typically found in dark, undisturbed areas, such as basements, attics, and outdoor sheds. They are also common in gardens, where they can be found in vegetation, rocks, and other hiding places. The spider’s ability to adapt to different environments has allowed it to establish populations in a wide range of regions, including the United Kingdom, Ireland, and the southwestern United States.
Behavior and Diet
False Widow Spiders are nocturnal, meaning they are most active at night, and they feed on small insects and other arthropods. They are also known to be opportunistic feeders, taking advantage of any available food source. The spider’s diet consists mainly of flies, mosquitoes, and other small insects, which it catches using its webs or by actively hunting them.
In conclusion, the False Widow Spider is a species of spider that has gained significant attention in recent years due to its resemblance to the Black Widow Spider and its potential to inflict painful bites. By understanding the spider's physical characteristics, web-spinning behavior, habitat, and diet, we can better appreciate its importance in the ecosystem and take steps to peacefully coexist with these fascinating creatures.
What does a False Widow Spider look like?
+The False Widow Spider has a dark brown or black body, which can grow up to 10 millimeters in length, with a distinctive orange or reddish mark on its abdomen. Its body shape is more rounded than that of the Black Widow Spider, and its legs are longer and thinner.
Where are False Widow Spiders typically found?
+False Widow Spiders are typically found in dark, undisturbed areas, such as basements, attics, and outdoor sheds. They are also common in gardens, where they can be found in vegetation, rocks, and other hiding places.
What should I do if I'm bitten by a False Widow Spider?
+If you're bitten by a False Widow Spider, you may experience minor symptoms, such as redness, swelling, and pain at the bite site. In most cases, these symptoms will resolve on their own within a few days. However, if you experience more severe symptoms, such as difficulty breathing or swallowing, you should seek medical attention immediately.
Meta description: Learn about the False Widow Spider, its physical characteristics, web-spinning behavior, habitat, and diet, and discover how to identify and peacefully coexist with these fascinating creatures. (150 characters)