You've probably heard of invasive plants, but what about invasive birds? These common nonnative species are now abundant in ...

The cheery and sociable house sparrow ... than native sparrows. Bill thick, conical; legs short; stocky build. One molt per year, but seasonal variation pronounced. Adult male: worn (breeding ...

DEAR JOAN: A male house finch that is ... My avian guests include house finches, California towhees, Oregon juncoes, white-crowned sparrows, chickadees and pretty little Townsend’s warblers.

Would you rather be a house sparrow or a peregrine falcon? A house sparrow or a sandhill crane? Never mind how these birds look, the names are on different planes. Maybe the scientific name will ...