Overview Sometimes when we are walking through our yards or communities, we don’t see the critters themselves as much as we see the signs they leave behind. Such is the case with the goldenrod gall fly (Eurosta solidaginis). Goldenrod gall flies can be found throughout most of North America. There are two subspecies – one … Continue reading The Goldenrod Gall Fly: An Insect with a Fascinating Life History and Valuable Role in the Ecosystem