What are These Strange Orbs on My Oak Trees? - Gill Garden Center + Landscape Co.
What's wrong with my plant? : Garden : University of Minnesota Extension
Tree galls are rarely cause for concern - Forestry
Oak Galls: What Are Oak Galls | Davey Tree
The gall of that oak tree! | Opening the door, walking outside
Balls on oak tree - Ask Extension
Quick Tip: What are those Round Growths on my Live Oak tree? | The Masters Lawn Care
What Are Oak “Apples”? | The Granada Native Garden Newsletter
Look at the first photo.... - Connecticut Fish and Wildlife | Facebook
Plant galls: home for insects - Science Musings
My tiny oak tree is growing weird balls that aren't acorns | Nature and Garden Forum
Oak Galls and Mistletoe: Nature's Decorations - The Real Dirt Blog - ANR Blogs
www.dirtdoctor.com • View topic - red oak tree balls
What Are Oak Apple Galls? | Gardening Question - New England
You'll Never Guess What's Inside These Cute Little Oak Tree Balls
Nature: Sonoma County is bursting with galls
Those weird balls on your oak tree are from gall wasps
Oak Galls: What Are Oak Galls | Davey Tree
Oak Gall Wasp | From the Ground Up - YouTube
How Wasps Make Beautiful and Complex “Oak Apples” | Brandywine Conservancy and Museum of Art
Oak trees have a lot of gall - 'oak apple gall,' that is
