A friend of mine took that picture while he was in Tuscan, Arizona. How do you tell the difference between the two species? I suppose I should specify more so than I did in the title: is it C. atrox or C. scutulatus?
Here's another picture of it:
Of course he posted all this on Facebook and had plenty of people posting up how many they'd killed and "why didn't you kill it?" It drives me nuts! Why I even start "arguments" with ignorant people like that I don't know because it never goes anywhere... you all understand how it is.