Grasshopper Warbler – first and last dates

Locustella naevia – TROELLWR BACH – Breeding summer visitor and passage migrant.

Earlier records are summarised in Grasshopper Warbler 1994

Year	First date	Last date	Notes
1993	13 April	18 September	9 singing on 80 hectares at Dowrog
1994	18 April	23 August
1995	26 March	5 September	First to be recorded in March in Pembrokeshire, 12 days earlier than previously recorded. 7 territories mapped on Dowrog Common
1996	13 April	4 September
1997	14 April	22 September	8 territories mapped on Dowrog Common
1998	5 April	3 October	8 territories mapped on Dowrog Common
1999	6 April	20 September	5 breeding territories Dowrog, 3 at Teifi Marshes
2000	16 April	28 September
2001	12 April	12 September	A min. of 2 pairs bred Castlemartin Range.
2002	6 April	20 September	Widespread reports for April & May; max. 5 Strumble Hd 21 Apr, 6 Skomer 21/22 Apr, 4 Fishguard – Dinas 24 Apr, 4 Rhoslanogfach 26 Apr. In autumn: singles, Castle Martin 28 July, Gelly 5 Aug, Skomer 20 Sept – only records received
2003	4 April	21 September	Widespread spring records at mainly coastal sites.
2004	11 April	31 October	Recorded widely Apr-May, mainly at coastal sites.
2005	21 April	1 August	7 singing Goodwick Moor 24 April
2006	21 April	25 September	Recorded from 12 sites during Apr with 6 reported from suitable breeding habitat thereafter. The first autumn migrant Skokholm 6 Aug and the final record Skomer 25 Sept.
2007	12 April		Some 100 records across the county April – September, with the highest counts being of 7 singing males at Goodwick on 21 April, 3+ pairs breeding pairs at Llangloffan Fen.
2008	12 April	31 August	18 singing birds Teifi Marshes on 8th June
2009	10 April	20 Sept	Max count was of five at Pencarnen on 18 April
2010	9 April	9 October
2011	2 April	1 October
2012	20 April		Max count was of eight singing birds at Trefieddan Moor on 2nd May
2013	12 April	8 August
2014	12 April	25 September	A total of six reeling at Trefeiddan Moor at midnight on 1st May
2015	15 April	2 October	Last recorded Marloes Mere on 31st July and on Skomer on 1st & 2nd Oct.
2016	11 April	not reported after June.	Recorded from at least 13 1km squares, with breeding evidence from at least 7 of these.
2017	7 April	25 September	Recorded from at least 26 1km squares. Presence of singing males noted from half of these but no confirmed breeding reported. Single seen on The Smalls 19th & 21st April.
2018	13 April	24 September	Reported from at least 23 1km square locations. Breeding evidence at five of these was limited to reeling birds only.
2019	8 April	26 August	Reported from 29 locations. Breeding evidence was reported from six locations. Largest counts received were of three: at Teifi Marshes 8 Apr, The Gann 1 June & Llangloffan Fen NNR 22 June, and on passage on Skokholm 1 May.
2020	9 April	19 September	Summer / breeding season records came from: Folkstone Farm, Gann, Heathfield Gravel Pits, Maenclochog, Mullock Bridge. Southwood Farm (Nolton), Teifi Marshes (four), Trefeiddan, Trehenlliw Farm and Ty-rhyg.