| Clue | Source | Date |
|---|---|---|
| Early-rising duck's call? | LA Times Daily | 11 Jul 2019 |
| Early-rising duck's call? | The Washington Post | 11 Jul 2019 |
| Early-rising duck's call? | ||
| What wakes everyone up in the morning at the duck pond? | New York Times | 14 Feb 2017 |
| What wakes everyone up in the morning at the duck pond? | ||
| Start of a duck's day? | ||
| Start of a duck's day? | ||
| Mallards' wake-up call? | ||
| Mallards' wake-up call? |