macro of galls or cecidia outgrow of galls wasp eggs on the surface of fagus leaves

bad beam beech botany bunch cecidia cecidomyiidae cecydium close cluster cynipidae detail ecology fagi fagus fly forest furrow galas gall gallflies galls green group grow growing ill insect insects larvae leaf leaves macro many midge mikiola nature parasite pest plant red small surface sylvatica tissue tree wasps wood zoom