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 ...

They can appear on any part of the plant with vast variation in morphology, appearing as anything from smal,l simple growths barely visible, such as aphid galls, or to large hard masses such as oak ...

The key to this study lies in the ants' taste for fatty acids, which form the coating of these oak galls When the ants eat that fatty part, they leave the rest. Thus, the wasp larvae remain hidden.