Many coast live oak (Quercus agrifolia) trees are showing unusual browning in their canopies in the last month or two. If you look carefully, you may see small, crescent-shaped galls forming on the ...

Earlier this month my colleague, LyAnn Graff, brought in an interesting looking fuzz ball surrounding a thin leafy branch of a burr oak tree. It was about the size of a golf ball, but with red-tipped ...

Hundreds of species of small wasps called gall wasps live in the forests of North America. Hundreds more species of them are spread worldwide. In Southeast Missouri oak trees are a favorite host plant ...

The long, meandering branches of 2,270 live oak trees arch over almost every sidewalk at Rice University, shading students as they walk to class in the oppressive Houston heat, and creating a leafy ...

Oak gall wasps and their predators don’t have the panache of butterflies, but they’re attracting growing interest among both scientists and naturalists. Only 1 to 8 millimeters long, these small ...