19th September 2012: Common spangle galls on the underside of an oak leaf. These are fertilised eggs, which are laid by the female gall wasp Neuroterus quercusbaccarum in June. One leaf can have up to 100 of these galls, each containing a single developing larvae.
The Wilden Marsh Blog 
Really cool close up Mike!
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Thanks, Phil.
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Fantastic detail…and I loved the info…I had no idea!
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I am glad that this post is informative, Suzanne.
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