| Clue | Source | Date |
|---|---|---|
| The branch of zoology that deals with the study of eggs, especially birds' eggs (6) | ||
| Study of birds’ eggs | ||
| The study of birds' eggs | The Guardian Weekend | 03 Sep 2022 |
| Gents getting up close to Furbo on the outskirts of Galway for the study of birds' eggs | Irish Times Crosaire | 11 Dec 2021 |
| Another name for an egger’s hobby | The Times Specialist Sunday | 07 Feb 2021 |
| Discipline in branch of natural science not unknown | ||
| Study circles unknown to keep record | ||
| Study of 9 Down | ||
| Study of birds' eggs | ||
| Study of birds' eggs. | ||
| The study of birds' eggs. |