Oak apple gall (Cynipidae) · Created by gall wasps in the family Cynipidae · 5/18/2013 · Oak Hill, Littleton Conservation Land, Littleton, Massachusetts · ≈ 7 × 4½″ (18 × 12 cm)
Oak apple gall (Cynipidae) · Created by gall wasps in the family Cynipidae · 6/1/2014 · Oak Hill, Littleton, Massachusetts · ≈ 8 × 6″ (20 × 14 cm)