| OOLOGIST | Person involved in the collection or scientific study of bird eggs (8) |
| MAN | Person involved in the centre of the puzzle theme answers |
| OOLOGY | Branch of ornithology concerned with the collection and study of bird eggs (6) |
| ORNITHOLOGY | What do you call the scientific study of birds? (11) |
| RHEOSTATS | Current regulators with a lot of bird egg data |
| CURATING | The selection and organisation of items in a collection or exhibition (8) |
| AMASSING | There's a Chinese animal in the collection (8) |
| HERITAGE | Definition given to a stretch of undeveloped coastline with notable natural beauty or scientific significance in England and Wales (8) |
| RAISONNE | Paired with "catalogue", a French term for an annotated systematic index or listing of an artist's oeuvre in a collection or exhibition (8) |
| OLYMPIAD | A major international contest in a game, sport or scientific subject (8) |
| GLOSSARY | A collection or list of explanations of words (8) |
| SEAFEVER | Poem by John Masefield featured in the collection Salt-Water Poems and Ballads (3-5) |
| OVERHEAD | What a player has to pay to play, as the time collection or the drop or rake* |
| EXPLORER | Someone who travels to little known regions, especially for research or scientific purposes (8) |
| SPECKLES | Features of some bird eggs |
| LARKSPUR | Bird egg on flower (8) |
| MATHNEED | Protractor or scientific calculator |
| OMNIUM | From "of all", the velodrome's equivalent of a decathlon in track cycling; or, with "gatherum", pseudo- Latin for a miscellaneous collection or gallimaufry of people or things (6) |
| AUDEN | Pulitzer Prize-winning author of Letters from Iceland, For the Time Being: A Christmas Oratorio and of the poems published posthumously in the collection Thank You, Fog (5) |
| CODE | Word originally for a collection or digest of laws, later a secret message or cryptogram cracked by means of a cipher; or, a system of signals such as Morse or Semaphore (4) |
