Keel-billed Toucan

Including its bill, the Keel-billed Toucans ranges in length from around 17 to 22 inches (42–55 cm).[3] Their large and colorful bill averages around 5–6 in (12–15 cm), about one-third of its length. It typically weighs about 380–500 grams (13.4 oz.–1.1 lbs.)[4] While the bill seems large and cumbersome, it is in fact a spongy, hollow bone covered in keratin, a very light and hard protein.