I've never seen more than 5-6 Trants in a single day on my property and 2 one night in my house. But, I've seen millions of Millipedes crossing the hyway in Mexico once. My tires were so slick if I had to stop quickly, there would have been an issue.
Did you know that spiders eyes glow like most animals do at night. Once while at a knapin near Big Bend National Park, I had to take a leak at night. I was camping, so I grabbed my flashlight, found a good spot near a small hill, did my thing. While doing so, I turned on my flashlight, and scanned the small hill. It lit up. I thought it was glowing rocks and hit the jackpot, but when I got done and went over to the small hill to look. Man, I have never seen so many small spiders in one place that covered about 50 yards wide and maybe 5-6 feet high. There were spiders about 2 inches apart. I didn't see any on flat ground, but the side of that hill was covered. ........... Nubs