You could spot one or two, then dozens around the same tree. Oak galls are the result of gall wasps. Inside the galls are the ...

READ MORE: That Ball of Leaves in Your Tree Isn’t a Bird’s Nest Unless of course, a competing kind of wasp manages to penetrate the shell of the oak gall and lays their own eggs inside.

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 ...

The oak is a symbol of endurance and strength but how much do you know about the nation's favourite tree? Oaks are more ... Mozart's music - were written using oak gall ink. It was the standard ...

The invasive gall wasps were first discovered on Oahu in 2005. They spread quickly throughout the state and resulted in the death of thousands of Erythrina trees, including native wiliwili trees.