western diamondback rattlesnake

You're welcome and thanks too!

And the Prairie Rattlesnake doesn't have any black on the tail, its tail is brown and white banded. This is definitely Crotalus atrox.

Hi Sarah. Thanks for clarifying that. To reposition the spotting...Click on the minus sign on the spotting map until both South Dakota and Arizona appear. Then drag the marker from SD to AZ. Click on the plus sign to make Arizona larger. Then using zoom and drag the marker to the location of the spotting. Concerning the species identity...Please compare the two species in the following links. http://www.reptilesofaz.org/Snakes-Subpages/h-c-viridis.html AND http://www.reptilesofaz.org/Snakes-Subpages/h-c-atrox.html . Note the pattern immediately above the rattle. This is a western diamondback. See the range of the prairie. It does not occur in southern AZ. Cheers

I've added the suggestion of Crotalus atrox as per the discussion since this is unresolved.

It's Crotalus atrox for sure. I've sent Sarah a message about checking her locations. I'm sure it's a default setting on the PN app that needs to be changed.

Then she took the photo from somewhere like a zoo out of state.

Oh, that's definitely a diamondback, with the black and white stripes on the tail and the diamonds. Prairie rattlers have "saddles" instead of diamonds (more rounded blotches).

Please update your maps to reflect the actual locations of the spottings so others can ID the organisms correctly.

Well if this was really taken in South Dakota then there is only one venonous snake in SD.

That really looks like a Western Diamondback (Crotalus atrox), but its geographic location is all wrong.