📏Size:  

• Medium to large North American scorpion
• Adults usually around 5–7cm
• Strong, heavy-bodied appearance with robust pincers

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🎨Coloration:  

• Usually tan, yellow-brown, to medium brown
• Legs and body often lighter brown
• Chela fingers, eyes, and sting tip may appear darker brown to black
• Overall colour can vary depending on age, sex, and locality

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Features:

• Mature males are especially known for the swollen telson/sting area, which gives the species its “swollenstinger” name.

The swelling sits between the telson vesicle and the aculeus
• Females lack the obvious male telson bulge
• Dark chelal fingers contrast against the lighter brown body
• Carapace and upper body can appear rough or granular rather than smooth