There are 4 stages of the spotted lanternfly.
Egg mass (October-June)
You can find egg masses on trees, stones, cars, patio furniture…really anywhere. The masses are 1 inch long and are covered in a white substance that dries over time, looking like mud (blending into things like trees).
Early stage nymph (May-June)
After they hatch, nymphs are very tiny and grow to about 1/4 inch. They have black bodies with white spots. They’re excellent jumpers.
Late stage nymph (July-September)
As late stage nymphs, SLFs get bright red spots in addition to the white. They grow to be 1/2 inch long.
Adult (July-December with egg laying beginning in September)
Adult SLFs are about 1 inch long. Their wings are red closest to their bodies, with tan wings and black spots outside. They like to jump and glide.