ocr: HOW BEAKS GROW CLOWNLIKE BEAK HE HARD keratin sheath that Colorful beak for T covers the beak grows throughout courtship display a bird's life. In young birds, the beak is often the tastest-growing part of the body. A beak generally stays the same shape, although the sheath can wear down with use. RED PLATE CHANGING COLOR In the breeding season, the Atlantic puffingrows a yellow pattle and bright beak plates. These fall off once breeding is WATTLE over, and the beak becomes dull.
