Apus apus – GWENNOL DDU –Breeding summer visitor and passage migrant.
Previous records are summarised in Swift 1994
| Year | First record | Last record | |
| 1993 | 4 May | 8 Oct | |
| 1994 | 28 April | 30 Sept | |
| 1995 | 29 April | 30 Oct | |
| 1996 | 15 April | 7 Sept | |
| 1997 | 23 April | 11 Oct | |
| 1998 | 21 April | 26 Sept | |
| 1999 | 12 April | 22 Sept | |
| 2000 | 30 April | 1 Oct | |
| 2001 | 24 April | 26 Sept | |
| 2002 | 24 April | 12 Sept | |
| 2003 | 24 April | 28 Aug | |
| 2004 | 25 April | 10 Sept | |
| 2005 | 21 April | 4 Sept | |
| 2006 | 14 April | 23 Sept | |
| 2007 | 20 April | 18 Aug | |
| 2008 | 10 April | 17 Sept | |
| 2009 | 17 April | 30 Aug | |
| 2010 | 21 April | 4 Sept | |
| 2011 | 1 May | 31 Aug | |
| 2012 | 26 April | ||
| 2013 | 21 April | 30 Aug | |
| 2014 | 13 April | 16 Sept | |
| 2015 | 18 April | 19 Sept | |
| 2016 | 19 April | 26 Sept | |
| 2017 | 19 April | 28 Aug | |
| 2018 | 25 April | 10 Aug | |
| 2019 | 30 March | 31 Aug | |
| 2020 | 22 April | 26 August | Single bird on 1st Jan at Marloes Mere |
