Gall wasps are a stingless species that create galls on trees and bushes where they grow from larvae into adulthood. So, now we know they won't hurt us, but are those bulbous tumor-like balls on ...

An 8-year-old’s casual backyard observation has transformed our understanding of an intricate relationship between ants, wasps, and oak trees. What appeared to be ants carrying seeds turned out to be ...

Leaves of endemic wiliwili riddled by Erythrina gall wasp damage are pictured on a tree on Kahoolawe in 2008. FOREST AND KIM STARR photo Reinforcements are being called to the front lines of a ...

Erythrina gall wasps are yellow 6- to 8-millimeter-long invasive pests. They create galls — swollen, tumor-like growths — in erythrina tree tissue that serve as cocoons for their larvae to mature.