Odd Insect Nest

insect nest
I came across this strange thing while pruning dead fronds from a fern plant. Had I not seen a similar picture on the internet I never would have guessed that it was a debris covered cocoon. I sure would like to watch the caterpillar make the cocoon and then camouflage it with plant matter. The curious thing to me was that the debris did not look like any dried plant material on the fern. I wonder if she found something suitable and then dragged it to the location? I'll be on the lookout to catch one during construction.