I live in Arizona. These have been coming out in the evening. They are 1-2” long and looking like really skinny earthworms. I took it to the local pest supply store and they had never seen anything like it.
Update: my pest control company had never seen anything like it. They sent some examples to ASU to identify. Turns out they are a type of millipede. Very uncommon in this region.
Did you pick it up, OP? Is it scaly or slimy? If it’s scaly, it may be a Western Threadsnake. If it’s slimy it’s some variety of earthworm.
I haven’t picked one up…they are freaking me out. They are about the same diameter as the old iPhone corded earphones…very tiny.