The bagworm (Thyridopteryx) is a moth that spins its cocoon all its larval life, decorating it with bits of juniper, cedar, and other such conifers. When mature, it wraps silk around a branch, hangs from it, and pupates. The male emerges and flies on transparent wings (Greek thuris window + pterux wing) smelling for a female. The female merely opens a hole in her cocoon at the tail end. Later her pupal case can be found, full of yellow stuff, which is the remains of eggshells.
