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Photo#648801
Cecropia moth - Hyalophora cecropia - male

Cecropia moth - Hyalophora cecropia - Male
Columbia County, Pennsylvania, USA
May 29, 2012
Size: wingspan is 6 1/2 in.
The moth has a strange yellow sac on its wing. Please somebody tell me what it is! I found the cocoon in a nearby forest.

Images of this individual: tag all
Cecropia moth - Hyalophora cecropia - male Cecropia moth - Hyalophora cecropia - male Cecropia moth - Hyalophora cecropia - male Cecropia moth - Hyalophora cecropia - male

Moved
Moved from ID Request.

I've noticed that sometimes, after hatching, large moths such as cecropias, get this "bubble" of fluid on their wings, which usually hardens. I think it is a deposit of the "blood" that is pumped into the wings to expand them. I have never noticed anything detrimental attributed to these bubbles.

 
moving
Where was it moved to?

 
bubble
So will it go away? Because it looks like is starting to shrink.

 
Bubble
It may or may not. If it's shrinking then perhaps it will. These images were moved to the cecropia moth file.

 
Bubble
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