Saturday, December 15, 2012

Oak Bullet Galls

We found these at Theodore Wirth Park last weekish growing on some of the oaks.  They are galls caused by a tiny Cynipid Wasp.

I'm not sure if I've ever met a Cynipid in person before, but the galls of many species can be quite noticeable.  They have a interesting life cycle which I attempted to sketch out above