Sal:post-metamorph
I learned that part of the issue stems from ARW not validating all of the bulk entry fields. That’s why it’s been accepting entries like “Post-metamorph (yellow/black pattern)” for the Life Stage instead of “Sal:post-metamorph”. I’ve reported it as a bug and created a ticket for it: Bulk import does not validate all imported fields · Issue #317 · WildMeOrg/Wildbook · GitHub
Based on this previous Community post, the species prefixes were added to the life stage options as a workaround for differing life stage needs for toads and salamanders.