Arthropod succession was evaluated on pig carrion in the spring/summer of 2005 in southern New Mexico. Three domestic pigs, Sus scrofa L., were euthanized and placed in steel cages (1.2 x 1.2 x 1.5 m): two in equivalent partial shade habitats (one as a control), the third in a full-shade enclosure. Ambient, internal, and soil temperature and humidity readings were taken hourly from each pig with Hobo units. At each sampling event each carcass was visually observed for 5 min to document arthropod diversity, position and behavior; samples then were taken with a sweep net and forceps on the surface, beneath, and around the carcass; and carcasses were evaluated for stage and rate of decay. Each pig was examined twice a day for eleven days. As arthropod activity noticeably declined, samples were taken three times per week, then once every four days. Adult and larval specimens were taken to the laboratory for later identification. Adults were frozen and later pinned, and larvae were preserved in KAAD and transferred to 80% EtOH. Species composition and succession of the arthropods was evaluated in relation to stage and rate of decay of the pig carrion. This study provides much needed baseline information for arthropod succession on carrion for southern New Mexico.