Insect life stages typically identified for PMI assessments include?

• A. Eggs only
• B. Eggs, larva, nymphs, pupa, and adults
• C. Seeds and spores
• D. Larvae and adults

Answer: (B)

PMI estimates rely on identifying how far an insect has developed on a body, because each developmental stage represents a minimum amount of time since colonization. Insects can undergo complete metamorphosis (egg → larva → pupa → adult) or incomplete metamorphosis (egg → nymph → adult). To capture all the possibilities a forensic entomologist might encounter, you need to recognize all the major life stages: eggs, larvae (or the various larval instars), nymphs (for species with incomplete metamorphosis), pupae, and adults. This comprehensive view lets you match the observed insects to species- and stage-specific development timelines, narrowing the time frame for the minimum PMI.

Options that mention seeds and spores aren’t insect life stages, and focusing only on eggs, or only on larvae and adults, misses other informative stages (like pupae or eggs) that are crucial for estimating development time.