| Answer | Crossword Clue |
|---|---|
| WRENS | Birds that sometimes sing duets |
| EGRETS | Birds that sometimes perch on the backs of grazing animals |
| fowlpoxes | A slow-spreading viral disease of birds that produces wartlike nodules on the skin. Infestations sometimes threaten commercial poultry interests |
| fowlpox | A slow-spreading viral disease of birds that produces wartlike nodules on the skin. Infestations sometimes threaten commercial poultry interests |
