8.9K views · 119 reactions | Have you ever seen Oak Apples (Gall Balls)? The oak apple gall wasp, Biorhiza pallida, is a tiny wasp that causes growths, or 'galls', on oak twigs. These galls can be found between May and June where the female has laid her eggs in the leaf bud. Inside the gall, there are a number of chambers, each housing a larva which eats its way out. Adults emerge in June and July. Thanks Andrew for sending this in. | Get Wild | Facebook
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