The galls are the work of the two-horned oak gall wasp, Dryocosmus dubiosus, a tiny honey-brown wasp the size of a gnat. These tiny wasps are not dangerous to humans in any way, and they do not ...

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 insect's eggs and larvae. When the eggs are first laid, the galls will ...

How do you think they are formed? You may be surprised by the answer! Have you ever found a woody ball like this under an oak tree? Credit: Nathalie Roy Once the little parasitic wasp reaches maturity ...

or tumorlike growths created by the gall wasp Neuroterus bussae found on southern live oak leaves. The galls serve as microhabitats within which larvae feed, develop and pupate. The research team ...

The wasp eggs hatch first ... Scientists are also studying the habits and weaknesses of the Mediterranean oak borer, another invasive species that kills Oregon white oak trees.