Nests of paper wasps are made of paper-like material, created from wood and hardening saliva.
Paper wasp building nest
"Three animals, for instance, have independently invented the making of paper. Paper wasps use small particles of wood gnawed off from trees and wood posts as their raw material, and they mix these fibres with their hardening saliva." (Pallasmaa 1995:20)
Book Animal ArchitectureOctober 24, 2016 Ingo Arndt