The camouflaged killer! The sand assassin spiders are common throughout most of the southwest here in the US though not many people see them or are even aware they exist! This is largely due to the fact that they are true specialists in the deserts they call home; not to mention they’re near invisible to the naked eye as well! Despite looking shockingly similar to the deadly sand spiders of the family Sicariidae, these are not closely related at all and are likely completely harmless to humans.