Sylvia borin – TELOR YR ARDD – Breeding summer visitor and passage migrant.
Earlier records are summarised in Garden Warbler 1994
| Year | First | Last | Notes |
| 1993 | 17 April | 26 October | |
| 1994 | 2 May | 19 October | |
| 1995 | 14 April | 20 October | |
| 1996 | 22 April | 1 November | |
| 1997 | 25 April | 25 October | |
| 1998 | 5 April | 15 November | |
| 1999 | 25 April | 23 October | |
| 2000 | 23 April | 7 October | (1) |
| 2001 | 26 April | 28 October | (2) |
| 2002 | 22 April | 15 October | |
| 2003 | 18 April | 13 October | |
| 2004 | 26 April | 11 October | |
| 2005 | 1 May | 5 October | |
| 2006 | 19 April | 9 October | |
| 2007 | 18 April | 15 October | |
| 2008 | 23 April | 7 September | |
| 2009 | 26 April | 14 October | (3) |
| 2010 | 15 April | 7 November | |
| 2011 | 19 April | 4 September | |
| 2012 | 5 April | 11 September | (4) |
| 2013 | 17 April | 31 October | (4) |
| 2014 | 15 April | 22 November | |
| 2015 | 20 April | 19 September | |
| 2016 | 14 April | 15 October | |
| 2017 | 20 April | 25 September | |
| 2018 | 26 April | 25 September | |
| 2019 | 17 April | 30 September | |
| 2020 | 5 April | 18 October |
(1) one was caught by a cat in Penally on 26 Dec. 2000
(2) singles Skomer 16 Nov & Hook 7 Dec. 2001
(3) One on Grassholm on 13 August 2009
(4) Records from Birdtrack in Pembrokeshire as there is no last date in the bird report
