| Answer | Crossword Clue |
|---|---|
| ORNITH | Study of birds: Abbr. |
| OOLOGY | Study of birds' eggs. |
| OOLOGY | Study of birds' eggs |
| ornithology | the study of birds |
| OOLOGY | The study of birds' eggs. |
| oology | the study of bird's eggs |
| caliology | the study of bird's nests |
| ornithologies | ORNITHOLOGY, the study of birds |
| ornithology | The scientific study of birds |
| caliologies | CALIOLOGY, the study of bird's nests |
| oologies | OOLOGY, the study of bird's eggs |
| oologic | pertaining to oology (the study of bird's eggs) |
| oological | relating to oology, the collection and study of birds' eggs also OOLOGIC |
