Where's the Gold in Goldfinch
Color can be confusing. All winter long, you've adjusted your eyes to drab-looking birds at your feeders. Then spring comes, and you see a whole new array of color, plus some odd-colored birds you just don't recognize. What's going on? Color confusion throughout the year can be explained by three things: sex differences (sexual dimorphism), molting into winter plumage, and juvenile birds.
Photo courtesy of Roy Brown