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.
Feathers consist of interlocking microscopic structures that are light, but very strong. Layers of feathers trap air to insulate birds against cold and protect them from rain. Use of feathers permit. Feathers are made of keratin and grow continuously, the same as an eagle's talons and beak. Feathers grow from follicles; if a feather follicle is damaged, the feather could possibly grow back incorrectly or it might not grow back at all.