| Clue | Source | Date |
|---|---|---|
| Acknowledges, in a way | Thomas Joseph | 18 Aug 2025 |
| Welcomes without words | Newsday | 03 Aug 2024 |
| Greets silently | LA Times Daily | 28 Jan 2024 |
| Acknowledges silently | Newsday | 21 Sep 2023 |
| Silently acknowledges | LA Times Daily | 24 Mar 2022 |
| Silently acknowledges | The Washington Post | 24 Mar 2022 |
| Acknowledges with a head tilt | New York Times | 27 Dec 2021 |
| Recognizes silently | Newsday | 23 Sep 2021 |
| Silently acknowledges | New York Times | 09 Oct 2020 |
| Acknowledges nonverbally | Wall Street Journal | 24 Dec 2019 |
| Acknowledges nonverbally | New York Times | 12 Dec 2019 |
| Acknowledges nonverbally | ||
| Greets silently | Newsday | 08 Aug 2019 |
| Greets silently | USA Today | 02 Apr 2019 |
| Greets silently | ||
| Acknowledges, in a way | Thomas Joseph | 29 Jun 2017 |
| Acknowledges | The Washington Post | 07 May 2016 |
| Greets with a head bob | ||
| Greets aloofly | ||
| Signals with a head movement | ||
| Signals with a head movement |