Say's armored harvestman (Libitioides sayi). Reported to hunt slow-moving arthropods but like most opiliones not opposed to scavenging. At night they clump together with others of the same species (use a 365nm flashlight to find them, because they fluoresce). Found under a log near the Mississippi River in West Feliciana Parish, LA. #harvestman #opiliones #cosmetidae #arachnid #nature #louisiana