| Clue | Source | Date |
|---|---|---|
| Swift pursuers, perhaps | Wall Street Journal | 01 Jun 2024 |
| Followers of jays and swifts | Eugene Sheffer | 26 Jan 2023 |
| Cardinals' followers, say | LA Times Daily | 17 Jul 2022 |
| Ones really watching bills? | Universal | 21 Jun 2017 |
| Ones really watching bills? | ||
| Swift followers, e.g | Wall Street Journal | 01 Oct 2016 |
| Some ecotourists | Newsday | 14 Jul 2016 |
| Tourists with spotting scopes | ||
| Avid ones keep Life Lists | ||
| Avid ones keep Life Lists | ||
| Audubon Society members | ||
| Audubon Society members | ||
| Ones who pay attention to bills |