Click on the text link under each photo to see a larger picture.

Gall formed by the cypress twig gall midge on bald cypress

Photo credit: Albert (Bud) Mayfield, USDA Forest Service, Bugwood.org

Reddish-purple spikes on upper surface of grape leaf are grape tube galls formed

Photo credit: Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org

The poplar petiole gall aphid

Photo credit: Herbert A. 'Joe' Pase III, None, Bugwood.org

Gall on water oak

Photo credit: Chris Evans, Illinois Wildlife Action Plan, Bugwood.org

Leaf galls on bur oak

Photo credit: Steven Katovich, USDA Forest Service, Bugwood.org

Cynipid gall wasp damage on water oak

Photo credit: Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org