This is one of my bugs, (Extatosoma tiaratum). She is about 1/3 of the way through her life. She will more than double in size, and then I will be able to feel her weight, barely. In this photo, but for the faint tickle of her claws on my skin, she is completely weightless. I can’t feel her.
I watched this little one for a hours one day and couldn’t tell if she was scruffy old and ready to go, or young and still shedding baby fluff.
The next day, I found her dead on the ground under the feeder. When I picked her up, she seemed to weigh even less than my full grown Bugs. I still could not guess her age.