Have you even been exploring and wondered what those funny lumps and bumps are on the leaves and trees are? Well they might well have been galls!
Galls are growths that are caused due to associations with other organisms such as midges, sawflies, mites, fungi, wasps and others! Galls can be all different colours, shapes and sizes and the ones we have been looking for are Silk Button Galls and Spangle Galls! Both types of galls are caused by wasps and in particular, female wasps.
The Silk Button Gall is produced by an asexual generation of solitary female wasp called Neuroterus numismalis and gets its name due to its appearance looking like its covered in tiny golden silk like hairs, looking just like a silk button (this is where our wasps a -silking comes in). The sexual generation of these wasps produce a different gall that look like blisters on the leaves.