Gil, Yes some of them are Crotalus Atrox or Western Diamondbacks. It is not uncommon to find different species in the same den.
As Chuck has noted there are different color phases. The snakes from the north are usually darker in color and will not have the green tint they are known for.
GregSY, I know bird dogs and snakes dont mix but I am sorry you feel the way you do. Without these snakes the rodent population would grow unchecked and eat everything in sight. Best-JB