Black Widow and Brown Recluse Spider Bites

1. Black Widow vs. Brown Recluse Slideshow
2. Bugs and Their Bites Bites Slideshow Pictures
3. Bites and Infestations Image Gallery

• What Are Black Widow and Brown Recluse Spiders?
• Spider Bite Symptoms
• Spider Bite Treatment
• When to Seek Medical Care
• Spider Pictures

• Black widow spiders (Latrodectus mactans) may be black or brown with a leg span of approximately one to two inches. Most can be identified by a red hourglass marking on the abdomen.
• Black widow spiders are located throughout the United States.
• Black widow toxin causes nerve cell dysfunction and muscle cell twitching.
• Brown recluse spiders (Loxosceles reclusa) are tan to dark brown with a leg span of approximately 1 inch. Many have a violin-shaped marking on the chest.
• Brown recluse spiders are located mainly in the south central United States.
• Both black widow and brown recluse spiders are common in North America and throughout the world. Human contact with these spiders is usually accidental.

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Black Widow vs. Brown Recluse Spider in Pictures

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