Bolton Trails

The website of Bolton Trails Committee. Maps, routes, paths and events on conservation land in Bolton Massachusetts

Early stage white oak galls

In May 2022, Betsy Taylor-Kennedy saw these early stage oak galls on Wattaquadock Hill. They will turn into the familiar green and then brown balls that can be seen later in the season. Each gall holds the single larvae of a wasp in a hard seed-like cell in the center. The wasp that emerge through a hole. Afterwards the wall of the gall will dry to a brown paper-thin membrane.

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