Originally Posted By: Frank Nihei
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Except for the color, those look exactly like what we always had in Hawaii. They’d usually be found hanging from twigs, as well as protected interior walls like basements, garages, etc. There’d often be a very slim single thread like a spider’s, about 1/4-inch long and they’d just hang from that and spin or dangle in the wind.
I was told they were some sort of moth egg, but never saw what came out of them.
Occasionally, what ever was in it would "reel" the thread in and you'd see a microscopic, almost worm or slug-like appendage about half the length of the case (the yellow stuff in the photos above) which it would use to SLOWLY move from one spot to another...but that was very rare to see. At other times, the yellow thing was "glued" to whatever surface it attached itself to without the silk thread.
The ones in Hawaii were a uniform medium to dark dirty brown, about 3/4 inch long, less than 1/4 inch across. Exact same shape and curvature, though. Never saw any black and gray colored like this.
Funny thing is - I don't think I ever saw an empty one on the ground, so maybe this metamorphs into something else altogether?