First and fourth instars - Callosamia promethea
Denison University Biological Reserve, Licking County, Ohio, USA
July 11, 2005
Here is a size comparison between the fourth instar (right) and first instar (left). These are the same species, even though they look very different now. I was surprised to find the five small caterpillars last night, as they appear to have just hatched, while the ones I have been raising are close to pupating already!
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