They come out after rains at night.
I guess I would too, if my house got flooded every time it rained .. LOL
Boy that is the Gods honest truth. We used to have this old adobe line camp where we ran steers between Laredo and El Indio. You kept your valuables and clothes wrapped and tied in a plastic garbage bag. Boots were place on pegs upside down. I cannot count the times that I had to chunk these critters out of my bunk at night.
I may be mistaken but these things migrate. We were out one afternoon and thousands upon thousands of them came marching by. They were everywhere as thick as grass. They interrupted the dung beetles that rolled their priced balls under the porch every afternoon. Yep, collision of spider and turd rustlers.
That and scorpions. The place was loaded with them.