SUNBATHING - Immature Red-Bellied Woodpecker suns on a dead limb. Birds spread their wings and soak up the sun on warm days. One likely benefit of sunning is that feather-degrading bacteria are inhibited by sunlight. Other possible reasons include converting vitamin D, and controlling feather lice - either by killing them or causing them to move, making it easier for birds to remove them by preening.
