Hadrurus

The species of this genus are large (up to a max of 15 cm) and hairy scorpions with yellowish tones through their bodies although there is an exception in Hadrurus spadix, a species which has a dark almost black prosoma and mesosoma while the palps, legs and metasoma are yellow in color. Not the palps nor the metasoma are in any way reduced in size.

Though not considered to have a dangerously toxic venom, its sting is still quite painful; unlike other big species of scorpions which defend themselves using their powerful palps to pinch the attacker, the species of Hadrurus prefer to sting.

The species of this genus are quite active through the night foraging for food or a potential mate. They are avid burrowers, preferring somewhat (but not completely) loose soil such as dried sand to make their burrows. If loose soil is not available, they can take shelter beneath rocks and dead plants such as Opuntia and Cylindropuntia during the day. It bears live young which are guarded by the female until they undergo their first molt.