[1][2] This is the only scorpion from the genus Anuroctonus in Baja California.

[4] These scorpions have very large, black-tipped claws, and a "swollen region just before the stinger" on their telsons, most prominent in mature males.

[5][4] California swollen-stinger scorpions are nocturnal ambush predators who mostly wait in their burrows for bypassing prey species.

[6] Stings from the mildly venomous California swollenstinger scorpion are rare.

[4] They are usually painful but non-serious and resolve after 24 hours; however, in some cases stings may pose serious health problems in the very young or old, and professional medical attention is recommended for anyone stung by a scorpion.