I know. I was also reading about how the female basically becomes the egg sac as well (http://entnemdept.ufl.edu/creatures/MISC/MOTHS/bagworm.htm) It's almost as odd as male angler fish. Crazy...
That's odd and yeah that is interesting that they have vestigial wings, legs, and mouthparts? But she does need to leave to reproduce right or does the male impregnate the female in the case? That is so interesting...wow.
Glad you like the site Rosa. It's a great place to learn some biology quickly. Being a case moth this is not really a cocoon and you might be disappointed that nothing will come out of it at all. Case moths spend most of their lives in the caterpillar phase (1-2 years) and, as caterpillars, they never leave their cases. The females continue to live in their cases after they’ve pupated. Males leave their case after pupation to search for females.
This looks like some bagworm (Psychidae) - check these near the bottom of the page http://www.susanleachsnyder.com/GopherTortoisePreserve/InsectOrderLepidoptera.html
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