Under their nearly impenetrable coat of contour feathers lies a dense layer of soft, fluffy feathers called down, which may be up to two thirds of an inch [1.7 cm] thick and cover most of the duck’s body.
उनके भरे - पूरे देहपिच्छ के नीचे नरम, रोएँदार परों की एक मोटी परत मौजूद होती है ।