NEBS
| Date | Clue |
|---|---|
| 2021-06-20 | Birds' bills |
| 2019-10-10 | Birds' bills |
| 2018-01-14 | Bird bills |
| 2017-07-16 | Bird bills |
| 2014-10-16 | Bird bills |
| 2013-08-11 | Birds' beaks |
| 2011-04-08 | Beaks |
| 2008-01-26 | Bills |
| 2005-03-12 | Bills |
| 2004-08-14 | Bills |
| 2003-11-02 | Beaks |
| 1999-08-05 | Beaks |
| 1999-05-29 | Beaks |
| 1997-11-22 | Bills |
| 1997-03-23 | Bills |