|Curiosity pushed me to look this up. Under their other name (there are several), harvestmen, we can discover that they're arachnids but not spiders. They have only one pair of eyes and their bodies are not segmented. They belong to a distinct order, Opiliones, distantly related to spiders.
And, oh, this is a terrific image. I love how the close focus on the body leaves most of the legs out of.
Along this line of interesting tidbits, the little tank-like sowbugs are not bugs at all. They are crustaceans.