The Australian Case Moth or Stick Insect carries this type of cocoon around for a couple of years. The structure uses sticks and silk thread.
The ground under some trees shows similar patterns when rain causes water to flow in rivulets, carrying small twigs which align themselves to form similar patterns. The Barmah Forest had many of these same designs formed at the base of some River-Gums and inspired this and several other artworks. Some are 3 dimensional sculptures made from metal rods welded into similar structures as you see here.
This simple observation has led to developing a new series of work inspired by the textures and patterns I see in the Australian bush. around our home.