Confidence votes 210. Antigone is considered a tragic hero, because tragic heroes have several qualities: They are royal, they have a tragic flaw that leads to their downfall, they have an unhappy ending, and lastly the character is worthy of concern. First, Antigone is royalty. This is shown through her bloodline in several ways.
The down feathers of eider ducks provide insulation due to lack of barbules and ability to fluff. Infrared image of a goose, showing its insulating capacities. Down feather structure is important for insulating properties. Eiders insulate their arctic nests with down feathers. Click/tap images for attribution and license information.
Figure 3 - American Robins egg and new hatchlings. Figure 4 - American Robin nestlings. Note that the down feathers are located on the head, along the back and on the wings. Feathers do not grow from all parts of the body. Feathers grow from well defined feather tracts called pterylae.