Cardinal Baldness: What Happened?

Soon after nesting season ends, many birds replace their feathers. Songbirds generally lose and regrow a few feathers at a time, so molt is hardly noticeable. But some birds, especially northern cardinals and blue jays, can lose all their head feathers at one time—a catastrophic molt. Not all cardinals or blue jays do this, but a significant number do, and it’s considered healthy and normal.