There are some species very simliar as Common Mormon Swallowtail in 5th instar, they are all green fat larva, but adults have very large difference. How to distinguish these species in 5th instar? Maybe there are some articles to show this.
https://www.inaturalist.org/taxa/141617?photo_id=43309389
https://www.inaturalist.org/taxa/125576?photo_id=153828207
https://www.inaturalist.org/taxa/51588?photo_id=32122067
https://www.inaturalist.org/taxa/51583?photo_id=77606164
https://www.inaturalist.org/taxa/1475913?photo_id=402354381
https://www.inaturalist.org/taxa/145586?photo_id=2794563