Name: Jake B
My grandma brought over five caterpillars(green/white
striped with yellow spots-black swallowtail). We fed them Queen Annes
Lace for several days and it appears that two have made it to the cocoon
stage. How amazing it has been to watch them for two weeks now! I
noticed some hair-like silk spun around them to keep them attached to the
side of the terrarium, but they are turning green. My question is how is
the actual green cocoon produced? Is it like a "molding" process? Is
the caterpillar still alive and producing this? When you look at a
butterfly, is the mid-section(body) the actual caterpillar that once was?
You might try starting with this page of articles on butterfly biology, from
the butterfly web site.
There are also links and other information on their home page.
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Update: June 2012