Dune scorpion

[1] It is common in the deserts of the southwestern United States.

[2] The dune scorpion is approximately 72 mm in length and 2.0 g in mass.

[3] Smeringurus mesaensis is fossorial and solitary, though young will aggregate shortly after dispersing from their mother.

Females of this species are typically larger than males,[4] with males traveling to find females during mating season.

[5] They are nocturnal creatures, active between 9 p.m. and 3 a.m., accounting for their daytime invisibility.