| Answer | Crossword Clue |
|---|---|
| PLUMA | Contour feather. |
| PENNA | Contour feather. |
| PENNA | Contour feather |
| pennae | contour feather, as distinguished from a down feather, plume, etc. |
| penna | contour feather, as distinguished from a down feather, plume, etc. |
| plumules | A bird's down feather, numbers of which form an insulating layer under the contour feathers |
