Donkey the environment. They may compete with livestock and native animals for resources, spread weeds and diseases, foul or damage watering holes and cause erosion. Few species of ass exist in the wild. The African wild ass, "Equus africanus", has two subspecies, the Somali wild ass, "Equus africanus somaliensis", and the Nubian wild ass, "Equus africanus africanus", the principal ancestor of the domestic donkey. Both are critically endangered. Extinct species include the European ass, "Equus hydruntinus", which became extinct during the Neolithic, and the North African wild ass, "Equus africanus atlanticus", which became extinct in Roman times. There are five subspecies
Equus (play) produced as a large-format artist's book by the Old Stile Press, with images and an afterword by the British artist Clive Hicks-Jenkins, in 2009. "Equus" was revived in San Jose, California, in March 2011 at City Lights Theater Company. This production, featuring actors Sean Gilvary as Alan Strang and Steve Lambert as Martin Dysart, received rave reviews. "The Mercury News" labeled Gilvary and Lambert as "haunting," stating Gilvary "...exposing emotions and epidermis, rides bareback in every sense. He gradually manages to make a rather unattractive young creature seem not only sympathetic but redeemable while retaining his hostility and humanity." Starkinsider