The snake in that photo is in fact a Blood Red Corn Snake that is 100% Het. for Anerythristic Type "B" - therefore it is het. for Pewter. If it were a normal, it would be labeled as a "Normal Corn Snake DH (double het.) for Pewter".
Not ALL Blood Red Corn Snakes will have a light gray or silver colored head like JY mentioned. What you should really be checking is the stomach patterns to confirm that the animal is a Blood Red - which of course you can't see in the photo. The stomach on that particular animal as well as the other female Blood Red we have is white colored and mottled with absolutely no checkers.
Our babies are born with silver/gray coloration on their sides and sometimes heads, black outlining, and red coloration. As they grow, the black patterning and their darker coloration fades away and our adults are a solid deep red color. Sometimes the gray/silver on their heads disappears and sometimes it stays. The pattern on our adults are also fairly faded giving them a more solid red appearance as opposed to other Blood Red lines you may see that still have very bold patterns.

I hope this information helps.
Thanks,
Celia
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Celia Chien
www.ExoticsByNature.com
2006 Boa Constrictor Morphs Calendar
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