Garden Warbler – First and last dates

Sylvia borin – TELOR YR ARDD – Breeding summer visitor and passage migrant.

Earlier records are summarised in Garden Warbler 1994

YearFirstLastNotes
199317 April26 October
19942 May19 October
199514 April20 October
199622 April1 November
199725 April25 October
19985 April15 November
199925 April23 October
200023 April7 October(1)
200126 April28 October(2)
200222 April15 October
200318 April13 October
200426 April11 October
20051 May5 October
200619 April9 October
200718 April15 October 
200823 April7 September
200926 April14 October(3)
201015 April7 November
201119 April4 September
20125 April11 September (4)
201317 April31 October(4)
201415 April22 November
201520 April19 September
201614 April15 October
201720 April25 September
201826 April25 September
201917 April30 September
20205 April18 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

Records extracted from the Pembrokeshire Bird Reports, which may contain more detail than shown here.

More about the Garden Warbler in Pembs

Garden Warbler – 2003-07 breeding

Sylvia borin – TELOR YR ARDD – Breeding summer visitor and passage migrant. Not recorded in January, March and December

Comparison with previous atlas:

1984-882003-07
Breeding confirmed4714
Breeding probable133163
Breeding possible1316
No of tetrads occupied193 (of 478)193 (of 490)
Percentage of tetrads40.4%39.4%

Surely it was this summer visitor that inspired the acronym LBJ (little brown job). It does however possess a pleasant mellow warbling song, though its critics often refer to this as being like a “garbled Blackcap”. It nests low down in shrubs and trees around woodland edge, rides and glades.

The 2003-07 survey found a marked absence in the extreme south compared to the 1984-88 presence. Nonetheless the totals registered for each of the two surveys was identical. The abundance map in the 1988-91 National Atlas indicates near maximum density in Pembrokeshire, which suggests the 1988 county estimate of 2,000 pairs was realistic. Since then the BTO has used a number of survey methods to conclude that although there have been short term fluctuations in the population, there has been a shallow long term decline. The BBS quantifies this as a 25% decrease in Wales between 1994 and 2007, which suggests the Pembrokeshire population had dropped to about 1,500 pairs by 2007.

Graham Rees. Pembrokeshire County Bird Recorder 1981-2007

Records extracted from the Pembrokeshire Bird Reports, which may contain more detail than shown here.

More about the Garden Warbler in Pembs

Garden Warbler – 1994

Sylvia borin – TELOR YR ARDD – Breeding summer visitor and passage migrant. Not recorded in January, March and December

1984-88
Breeding confirmed47
Breeding probable133
Breeding possible13
No of tetrads occupied193 (of 478)
Percentage of tetrads40.4%

Mathew (1894) found the Garden Warbler to be a scarce summer visitor, whereas Lockley et al. (1949) considered it widely distributed but local.

Today they breed commonly, their distribution showing a heavy bias towards the eastern half of the county (see map). An estimated average density of ten pairs per tetrad suggests a total breeding population of about 2,000 pairs. They arrive back on the breeding grounds from early May and become increasingly difficult to find from mid-August.

Up to ten Garden Warblers at a time occur on the islands and in scattered coastal areas from 23 April to 25 June, with occasional earlier birds from 6 April onwards, and again between 17 July and 28 October. They have been noted at the lantern of the Smalls lighthouse at night in May, August and September. Late birds were at Skokholm on 2 November 1968 and at Picton on 27 November 1977. A Garden Warbler seen at Pembroke on 28 February 1976 may well have overwintered, and another was trapped for ringing at Pwllcrochan in February 1992.

Donovan J.W. & Rees G.H, 1994, Birds of Pembrokeshire

More about the Garden Warbler in Pembs

Garden Warbler – 1894

Sylvia hortensis

This is another of the small summer visitors, which is common in Cardiganshire, and seems to avoid our county. We have never seen it, although from where he wrote, on the borders of Cardiganshire, Mr. Dix was able to report of it “about as numerous as, and seen about a week after, the Blackcap.” In the south of the county Mr. Tracy obtained a Garden Warbler in September, 1849, and states that it was the only one he ever saw. It passed into the collection of Lord Cawdor, at Stackpole.

Mathew M.A. 1894, Birds of Pembrokeshire and its Islands

More about the Garden Warbler in Pembs

Garden Warbler

Sylvia borin – TELOR YR ARDD – Breeding summer visitor and passage migrant.

Garden Warbler – 2003-07 breeding

Sylvia borin – TELOR YR ARDD – Breeding summer visitor and passage migrant. Not recorded in January, March and December Comparison with previous atlas: 1984-88 2003-07 Breeding confirmed 47 14 Breeding probable 133 163 Breeding possible 13 16 No of tetrads occupied 193 (of 478) 193 (of 490) Percentage of tetrads 40.4% 39.4% Surely it […]

Garden Warbler – 1894

Sylvia hortensis This is another of the small summer visitors, which is common in Cardiganshire, and seems to avoid our county. We have never seen it, although from where he wrote, on the borders of Cardiganshire, Mr. Dix was able to report of it “about as numerous as, and seen about a week after, the Blackcap.” In the south of […]