Hi @blackriverbrat, the only available options for annotating life stage of dragonflies are Egg, Nymph, Teneral, and Adult:
Currently observations are only able to be labeled as containing an exuviae is by using an observation field. Collection projects do not currently have a filter for particular observation fields, but you can follow/contribute to that feature request here: https://forum.inaturalist.org/t/add-tags-observation-fields-threatened-status-description-choice-s-to-populate-collection-projects/8639
For nymph and teneral, note that you can currently only add a single annotation type to a collection project:
