Grasshopper mice, which lives in the sonoran dessert may feel little or no pain from scorpion venom
But why is it immune to the toxicity of the venom too?
http://www.nature.com/news/rodent-immune-to-scorpion-venom-1.14014
http://www.sci-news.com/biology/science-grasshopper-mice-immunity-scorpion-venom-01495.html
