Not to call you out Andrew as we're buddy I just want to make sure people have correct information when dealing with snakes that can be this deadly. That is an AZ Mountain King in the picture and a very cool siting! I call those 40 hour snakes, meaning if you could out looking it's going to take you 40 hours to find one compared to maybe 1 hour when it comes to a diamondback.
As for the Coral, it's a fixed front fang snake in the same family (Elapidae) as the cobra, sea snakes, adder and so on. From what I know the only deaths that have ever come from a Micruroides are the larger Easterns as the ones we would see in the SW are very small, normally under a foot and a half.
Whit that said, these snakes are VERY rare to see in the wild, very secretive and normally only found at night. I have spend 1,000s of hours on the roads, hiking and looking for snakes and have never seen one. I have seen Banded sand snakes, Gilas, and a huge list of other uncommon reptiles but never a Coral. SO while you would have to really try to get bitten I also wouldn't play with them.
PS They also make a very odd popping sound though I've never heard it.