Possible Clues:

• Down mature fruit first
• Bird's feathers becoming dark red over time
• Soft fruit, mature, is down
• Something especially prized by mature birds?
• Bird's covering of feathers
• Cover for diver, purplish-red, to get on
• Best time to see feathers
• Time one put on superb coat
• Fruit getting mature's brought down
• Should fruit mature, birds will have it