Anaea ryphea/Fountainea ryphea, Heesch, Netherlands
Specimen, originally from Peru.
Here we're looking at the "leafwing" side of the wings, which mimics a leaf. The truly spectacular feature of this butterfly is the inside of the wings:
I was hoping to photograph the inside of the wings on the specimen but totally screwed it up. The wings were stuck together and crumbled like a dry leaf.