[Question] Dark Pigments on a Larvae

I found a larvae on my garden around two weeks ago. I decided to grow it and see what insect it becomes. Initially when I found it, it's color was white, but today when I checked it had some dark pigments on the tail side and spine area. Is that okay? Is it dying? Does it require some sort of food? I am keeping it on a soil with some greens (small pieces of leaves), browns (tree bark) and two dead flies (lol, just in case). I put little water every two-three days to keep it wet. P.S. It is still alive, moving and digging into the soil. https://preview.redd.it/b1p4ptnf4o351.jpg?width=878&format=pjpg&auto=webp&s=7e8e2214b3a52fb69b8b959681f6639f09a7b487 submitted by /u/Nerazzurri_KZ [link] [comments]

source https://www.reddit.com/r/Entomology/comments/gyx9mc/question_dark_pigments_on_a_larvae/