It's life, Jim, but not as we know it.

7 Spot Ladybird hosting the parasite that is killing it. The cocoon has been spun by the larva of the parasite (don't yet know what it is but intend finding out). Presumably a parasitic wasp deposited its egg either into the egg or larva of the Ladybird. It developed inside its host, eclosed (emerged), spun its cocoon and in time the imago (adult insect) will emerge.
Ladybird is in my house in a container for observation.
071023OM1071023
90mm macro lens hand held 15 images stacked in camera
Update.
The parasitic wasp is DINOCAMPUS COCCINELLAE.
It lays its egg into the body of the adult Ladybird, the larva feeds on non essential internal organs before it emerges and then spins its cocoon.
Astonishingly, the Ladybird may recover from its ordeal.
Nature is amazing.081023
Further interesting detail. The tiny -3mm - wasp is primarily parthenogenic, with males occurring very infrequently.

7th October 2023 7th Oct 23