Unlike birds whose plumage is mostly blue, the green coloring of a green bird’s feathers is primarily a combination of pigment and structure, not just a trick of the light. These birds’ emerald green, ...

A bird painted on a Mission District utility box by artist Claudio Talavera-Ballón. Photo by Yujie Zhou, Dec. 23, 2024. Chestnut-backed chickadees, yellow warblers and other feathered birds have ...

California is one of the largest states in the United States and one of the largest sub-national economies in the world. Indeed, it’s like a country all its own, full of thriving industries, ...