cocoon on spirea

Bill Oehlke oehlkew at
Sun Mar 9 23:10:23 EST 2003

Hi All,
If John's measurements are correct on website the cocoon is much too small for either cecropia or polphemus.
Cecropia cocons are usually at least three inches long and tapered sometimes at both ends, always near the top.
Polyphemus cocoons are at least 1/2-3/4 inch wide and about 1-1.5 inches long. Usually they are not affixed to twigs unless suspended by a shrt peduncle.
Pictures of cocoons of both species in the polyphemus article at
If dimensions are correct, then it is probably a small moth with wingspan about 1 inch.
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