Forest Scorpions

Pronunciation

How to pronounce Uroctonus: /ʊˈrɒk.tə.nəs/

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Summary

Uroctonus mordax, known as the California forest scorpion or western forest scorpion, is a scorpion species in the Vaejovidae family, notable for its restricted range to California's moist forests and for its shy behavior.

Physical Characteristics

Western forest scorpions have eight legs and two large claws in front of their mouths. Their bodies are squat with skinnier tails compared to other scorpion species. They are typically dark brown or black, with translucent yellowish-brown legs. Males are smaller and have a duller color than females, and the fifth metasomal segment has a ventral median carina that forks to form a 'Y'.

Identification Tips

They are described as smaller than a pinkie finger and have a sting milder than a honeybee's. They are shy and prefer to hunt on moonless nights, often running away rather than confronting threats.

Habitat

Most commonly found in California's Redwood Forests and Oak Woodlands, particularly in remote regions of the western-facing hills. They require moist environments and are often found under rocks, logs, and dead trees.

Distribution

Primarily restricted to California, especially the San Francisco Bay Area.

Life Cycle

Uroctonus mordax gives birth primarily in the summer months, delivering their young in an early developmental stage. The young are held in a membrane by the mother until they can escape, then they climb onto her back without their legs touching the ground.

Reproduction

The young are engulfed in a membrane at birth and are carried by the mother until they can leave the membrane.

Ecosystem Role

Considered a foundational species in their ecosystems, particularly in Redwood Forests and Oak Woodlands.

Tags

• Uroctonus mordax
• California forest scorpion
• western forest scorpion
• Vaejovidae
• scorpion
• Arachnida