Wasps' Nests Vespula/Dolichovespula species

Suspended Wasps' paper nest
Suspended Wasps' paper nest
Common, German and other "vespula/dolichovespula" wasp species are "social wasps" -- sometimes called "paper wasps," a term also applied specifically to "polistes" species, from their habit of chewing wood to a pulp and pressing it to form intricately-layered nests. These nests, larger than a football, are often suspended from/supported on trees at varying heights (see photos above - Common Wasp), built using an already excavated hole in the ground (see below, also Common Wasps) or, as many householders know, built in a convenient roof space or similar in a building.
Common Wasps' nest
Wasps' nest underground
Common Wasps' underground nest in a field
Wasps' nest
Wasps' nest
Wasps' nest
This intricate structure built in brambles is home to a colony of Median Wasps who chewed wood to a paper paste to build the interior layers and external shell.
Median Wasps' nest
Median Wasp
The queen starts the nest in spring and her newly-hatched workers take over to finish it.