The galls are the work of the two-horned oak gall wasp, Dryocosmus dubiosus, a tiny honey-brown wasp the size of a gnat. These tiny wasps are not dangerous to humans in any way, and they do not ...

Galls on oak leaves are harmless growths caused by specific insects. They have different shapes depending on the insect species causing the gall.

We all know forests harbor diverse ecosystems... As such, even in densely populated areas, trees of all shapes and sizes thrive. I only live about ten minutes outside of the city, and I have ...

You could spot one or two, then dozens around the same tree. 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 galls will ...

Imagine how many wasps come out of a full-size laurel oak covered with galls! The eastern horned gall wasp has been around for a long time. We had a pretty severe epidemic in the mid-1990s ...

The photo I received (and is pictured here) is a woolly oak gall, stimulated by the wool sower gall wasp. This small wasp (1/8” long) is harmless to people, only lays eggs on white oak branches ...

For decades, it has been known that most cynipid wasp species inject chemicals into leaves to induce oak trees to produce protective galls — or growths — around their larvae to ensure the ...

The orbs are known to appear between May and June, and the larvae eat their way out, emerging about a month later as adult oak apple gall wasps, according to The Wildlife Trusts. “Gall wasps won ...

They are called galls. Oak galls are caused by gall wasps, a small cynipid wasp. The female wasp lays her eggs on the tree. This irritation causes the abnormal plant growth we call a gall.