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Help Sexing Two Western Diamondback Rattlesnakes

C

compiler

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Hey everyone!

I have two Western Diamondback Rattlesnakes (Crotalus atrox), and I'm trying to determine their sexes.
I've attached one picture of each snake.
I'd really appreciate it if anyone with experience sexing this species could take a look and share their opinion.
Do you think they're males or females?
Thanks in advance for your help!
 

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