| Part of Mauritius's coat of arms | 36 |
| Out-of-date one | 15 |
| Onetime native of Mauritius | 27 |
| One who's not swift | 23 |
| One slow on the uptake | 22 |
| One behind the times | 20 |
| Old-fashioned person | 20 |
| Old fogey | 9 |
| Not-so-sharp bird | 17 |
| Mauritius casualty | 18 |
| Mauritian casualty | 18 |
| It was grounded, now it's gone for good | 43 |
| It became extinct less than 100 years after its discovery | 57 |
| Former native of Mauritius | 26 |
| Former Mauritius Islander | 25 |
| Flightless bird of the past | 27 |
| Extinction exemplar | 19 |
| Extinct Mauritian | 17 |
| Extinct bird, or birdbrain | 26 |
| Extinct bird of Mauritius | 25 |
| Extinct bird not known for its smarts | 37 |
| Extinct bird not known for its intelligence | 43 |
| Extinct "Wonderland" bird | 35 |
| Exemplar of extinction | 22 |
| Erstwhile bird | 14 |
| Dumbbell of a bird | 18 |
| Dumb as a ___ | 13 |
| Clumsy extinct bird | 19 |
| Bygone birdie | 13 |
| Bye-bye birdie? | 15 |
| Brained bird or birdbrain | 25 |
| Birdbrain, or extinct bird | 26 |
| Bird with a bird brain | 22 |
| Bird that went bye-bye | 22 |
| Bird on the Mauritian coat of arms | 34 |
| Bird of no return | 17 |
| Bird no more | 12 |
| Bird in "Alice in Wonderland" | 39 |
| Awarder of a thimble to Alice, in "Alice's Adventures in Wonderland" | 82 |
| Another dunderhead | 18 |
| Animal on Mauritius's coat of arms | 38 |
| A genius? No | 12 |
| Extinct birds' assignment? | 30 |
| Flightless birds | 16 |
| Extinct birds | 13 |
| Airheads | 8 |
| Fuddy-duddies | 13 |
| Grounded birds | 14 |
| Dummies | 7 |
| Idiots | 6 |
| Dimwits | 7 |
| Some extinct birds | 18 |
| Fogies | 6 |
| Noodleheads | 11 |
| Long-extinct birds | 18 |
| Bygone birds | 12 |
| Old fogies | 10 |
| Long-gone birds | 15 |
| Extinct flock | 13 |
| Geniuses they're not | 24 |
| Dumb bunnies | 12 |
| Wiped-out avians | 16 |
| Vanished creatures | 18 |
| Utter fools | 11 |
| Stupid people | 13 |
| Slow-witted ones | 16 |
| Real gone birds | 15 |
| Rattlebrains | 12 |
| Old fogeys | 10 |
| Mauritian has-beens | 19 |
| Extinct Mauritius birds | 23 |
| Extinct Mauritian birds | 23 |
| Dum-dums | 8 |
| Dull-witted sorts | 17 |
| Dim bulbs, so to speak | 22 |
| Defunct birds | 13 |
| Critters extinct since 1681 | 27 |
| Clumsy extinct birds | 20 |
| Brainless bunch | 15 |
| Birds extinct by 1681 | 21 |
| Backward ones | 13 |
| Bambi's aunt | 16 |
| Female deer | 11 |
| Buck's mate | 15 |
| Forest female | 13 |
| Female rabbit | 13 |
| Antelope | 8 |
| Anonymous John | 14 |
| John or Jane | 12 |
| Buck's partner | 18 |
| Meadow mom | 10 |
| Female kangaroo | 15 |
| Fawn's mother | 17 |
| Anonymous litigant | 18 |
| Fawn's mama | 15 |
| Surname ascribed to an unknown | 30 |
| Female hare | 11 |
| Fawn's mom | 14 |
| Female antelope | 15 |
| Bambi's mother | 18 |