| Clue | Source | Date |
|---|---|---|
| Insects' crops | ||
| Metaphorical sticking points | ||
| Birds' crops | Newsday | 26 Apr 2020 |
| Avian crops | LA Times Daily | 03 Apr 2019 |
| Avian crops | The Washington Post | 03 Apr 2019 |
| Animal stomachs | Family Time | 11 Feb 2019 |
| Avian crops | ||
| Crows' crops | LA Times Daily | 17 Mar 2018 |
| Crows' crops | The Washington Post | 17 Mar 2018 |
| Sticking points? | USA Today | 02 Mar 2017 |
| Sticking points? | ||
| Sticking points on crows? | Universal | 17 Sep 2016 |
| Sticking points? | Wall Street Journal | 29 Jul 2016 |
| Sticking points on crows? | ||
| Things may get stuck in these | ||
| Gullet parts | ||
| Huge mouths | ||
| Sticking points? | ||
| Sticking points? | ||
| Stomachs | ||
| Sticking places? | ||
| Sticking places? | ||
| Sticking points? | ||
| Animal stomachs | ||
| Animal stomachs | ||
| Crows' crops | ||
| Crows' crops | ||
| Animal stomachs | ||
| Animal stomachs | ||
| Crops | ||
| Bird crops | ||
| Birds' crops | ||
| Birds' crops. | ||
| Crops. |