If you are successful at keeping them alive during this time, Dr. lloyd recommends that they be released at the edge of your lawn, hopefully to lay eggs in the taller weeds and grass so that new fireflies will appear next year. What she actually saw were some adult boll weevils which were slightly smaller than usual. Most animals, like chickens, dogs, cats, rabbits, and even people look much like the adult when they are first born or hatched. Most insects, especially those with wings, are like the frog. They undergo metamorphosis, change of form, which is easily seen.
Some insects even have different habitats as immatures than they do as adults.
Mosquitoes and dragonflies fly through the air as adults living on land, but are swimmers which live under water as immatures. The changes which occur with some insects are more drastic than with others. Insects in which the young and adults look very much alike are said to have an incomplete or gradual metamorphosis. Insects grow exclusively during the nymphal or larval periods. They don't grow by regular gradual degrees like rabbits or dogs.