Oak galls

That wondrous place, the Internet has provided me with a raft of information on these oak galls.
 
The round, gold coloured galls are from the superbly named Silk Button Gall Wasp (Neuroterus numismalis). A wasp should emerge in February to April next year.
 
The flatter oak galls are from the equally wonderfully named Common Spangle Gall,  caused by the cynipid wasp Neuroterus quercusbaccarum 
 
If you haven't fallen asleep by now, the cyber world of gall wasps awaits you