Common Spangle Gall Wasp Neuroterus quercusbaccarum

Oak trees infested with these wasps display telltale signs: common spangle galls dotting the undersides of leaves and currant galls forming on catkins, sometimes mistaken for actual fruit. What makes this wasp truly bizarre is its life cycle—it alternates between asexual and bisexual generations, meaning some years the population is all-female while others require males. These chemically induced plant distortions are among nature's strangest sculptures, crafted through the wasp's manipulation of plant development.