How I previously wrote, the nests of sciagnathids are beautiful and diverse, they are made by saliva and plant fibers. The first nest is this of Nucesvenator, the nutcracker: [link]
different to other nestforms, this structure have two chambers, the upper is for the animal itself and the lower for the nuts it stored.
The second nestform which have similarities with barnacles from the distance, is typical for Silvavespillo viridis which often nest in colonies and sometimes also hunt in packs. Nest three is typical for Silvavespilla regalis and nest four is home of Sicagnathus longus.