"The Complete Boa Constrictor" A Comprehensive Guide to the Care, Breeding, and Geographic Races, Vincent Russo, ECO Herpetological Publishing, 2007.

"Designer Morphs", The Complete Guide to Medium Sized Python and Boa Morphs, John Berry, don't know publisher, Published in 2006 or 2007.

These two are the most recent and most comprehensive.
"Designer Morphs" covers much more territory, therefore is much more limited in coverage, the topic you're interested in.

I've got to say, I'm seeing some "Salmons" without the tell-tale Central American anterior gray characteristic, so think I better retract the "always" statement, or use the qualifier "usually" in that case.

Granted, others know much more than I do on morphs, bloodlines, origins.

jsc
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"As hard as I've tried, just can't NOT do this"
John Crickmer

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