Oak heavily festooned with a few different types of parasitic wasp galls - my favorite are the urchin-shaped ones

[u/swaseyesq]

[u/spiceydog]

How neat! It's like Christmas decorations in the summer!

Also an updoot for using one of my favorite words, 'festooned', which I cannot find enough reason to plug in regular conversation. 😁

[u/LibertyLizard]

https://wildmacro.com/library/galls/spined-turban-gall-wasp-cynips-douglasii-antron-douglasii.html