“Boy, he’s really red! I don’t think I’ve ever seen them that red before,” my wife said admiringly of a male purple finch crunching sunflower seeds at the feeder. He was a nice burgundy. The male goldfinches were getting yellower, but still looked scruffy. The birds made me optimistic that spring would finally get here. The next morning it was ten degrees.
Birds molt for a basic reason: feathers wear out. All that flying, preening, dust bathing, weaving through limbs of bushes and trees. For a bird, ratty feathers can be a death sentence. Feathers, which are made of keratin, like your hair and nails, have to be replaced. There is another reason to molt: it allows birds, mainly male birds, to don more colorful plumage for mating season.
Why males? » Continue Reading.