It had rained two days ago (July 3) and I guessed that this increase in moisture may increase the scorpion activity in South Mountain (as giant desert hairy scorpions choose they’re homes based on moisture, see Hadrurus arizonensis). I was correct. Tonight, with my partner’s (John De La Cruz) help we found three very large giant desert hairy scorpions in just forty minutes of searching. Because of our large catch I decided to release the remaining scorpion from last week’s hunt.
Methods: I had originally used tongs to grap the scorpions but found that this was not the best method as it was difficult to position, grab and control the grip with tongs. I found it much easier to drop the container over the scorpion and slide the lid under.
Locations: So far all of the giant desert hairy scorpion I’ve found have been in a wash under a palo verde or palo verde-like tree. The seem to avoid the sandy portions of the was, preferring instead to build their burrows under the above noted trees.
Weather: Although I have little data to back up this claim, it seems that the activity of the giant desert scorpion increases greatly after rainfall. Also, I saw fewer Arizona bark scorpions (Centruroides sculpturatus) than previously, indicating that their activity may actually be decreased after rainfall.