Very difficult origami

Dragonfly

Three crabs

"Crabs" and "Dragonfly" are each crafted from a piece of square paper with careful work. No part of the peper is cut. Instead the thin legs and wings are made by folding the paper into small parts. These models are made with very thin and strong Japanese paper (Washi). The thickness of a bundle of hundred pieces of this Washi is less than 1mm.
It takes a long time to fold these models. The "Crab," which is more complex, takes about three hours, and the "Dragonfly" takes about an hour.

Instructions for these models are written in "Very difficult origami works for experts" by Kunihiko Kasahara.(Japanese)