Reed Warbler – first and last dates

Acrocephalus scirpaceus – TELOR Y CYRS – Breeding summer visitor and passage migrant. Not recorded from December to March

Earlier records are summarised in Reed Warbler 1994

YearFirst sightingLast sightingNotes
19932 May12 October
199413 May12 NovemberLatest county record
199529 April18 OctoberProductivity: 106 of 204 trapped at Teifi Marshes CES were juveniles
199619 April10 October
199724 April15 October
199827 April9 October77 birds trapped at Teifi Mrshes CES (19 from previous years). Newly ringed were 36 juveniles and 22 adults. A bird ringed here in 1995 was retrapped 18 August 1998; in intervening years it had been retrapped in France.
19993 April15 SeptemberEarliest date for Pembrokeshire.
51 breeding territories at Teifi Marshes
20004 May30 September
200120 April4 November
20024 May28 October
200315 April15 October
200411 April25 October
20053 April22 October
200622 April28 September
200727 April
200825 April3 September25 singing birds at Teifi Marshes on 8 June
200912 April26 September111 ringed at Teifi Marshes CES
201022 April10 October
201115 April29 September
201212 May
201328 April25 July
201415 April28 September
201517 April29 September
201612 April8 October
201721 April10 September
201816 April29 September
201911 April18 October
20209 April21 October

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

More about the Reed Warbler in Pembrokeshire

Reed Warbler – 2003-07 breeding

Acrocephalus scirpaceus – TELOR Y CYRS – Breeding summer visitor and passage migrant. Not recorded from December to March

This summer visitor’s appearance is plain, with unstreaked brown upperparts and buff underparts.  Its slow chattering song is usually the first indication of its presence in the deep cover of reedbeds, its principal habitat. Its nest is intricately woven around the stems of reeds.

The Reed Warbler has slowly expanded its range in Britain from about the 1960’s, in Pembrokeshire from1974, with breeding proven in 1975. By the time of the 1984-88 survey an estimated 60 pairs were breeding in the county. The estimate was made after some time spent in the main localities and was based largely on singing birds. Assessing the Canaston reedbed (also referred to as Minwear or Slebech reedbed) was made particularly easy because the local shooting syndicate had cut rides through the reeds the previous winter. (Note that although the largest concentration in the district has been the Teifi Marshes, the majority of them have been in Ceredigion, so only a small fraction qualified for inclusion in Pembrokeshire assessments).

By the close of the 2003-07 survey an increase of 48% in distribution had been plotted but it is unlikely that this represents an increase in population of this magnitude. New sites were in small areas of reeds around ponds and along river banks, which did not have the carrying capacity of major reedbeds. On the premise that about 10 pairs were added in these new sites and that the main population remained stable, as it has nationally, there were probably about 70 pairs nesting in Pembrokeshire by 2007. Although the population estimates have been given in pairs, they are mainly based on singing birds and some of these may not have attracted mates, which is not uncommon among Reed Warblers.

Graham Rees. Pembrokeshire County Bird Recorder 1981-2007

Comparison with previous atlas:

1984-882003-07
Breeding confirmed87
Breeding probable1024
Breeding possible30
No of tetrads occupied21 (of 478)31 (of 490)
Percentage of tetrads4.4%6.3%

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

More about the Reed Warbler in Pembrokeshire

Reed Warbler – 1994

Acrocephalus scirpaceus – TELOR Y CYRS – Breeding summer visitor and passage migrant. Not recorded from December to March

Reed Warblers were not recorded by Mathew (1894), while Lockley et al (1949) noted just four records, the first being at the Smalls lighthouse on 17 October 1908.

They were first proved to be breeding at Nevern in 1975, although they had been present in suitable reedbed habitat at Pentood and Slebech from 1974. However, Lloyd records in his diary that H.R. Chubb claimed to have seen a pair and their nest at Goodwick Moor in 1934 or 1935, and Lloyd himself strongly suspected that they had bred at Tenby Marsh in 1931. They have continued to colonise Pembrokeshire since 1975, and may now have occupied most of the available suitable habitat. The total breeding population is currently about 60 pairs (see map).

Reed Warblers are occasionally detected on both spring and autumn passage, from 26 April to 17 June and from 22 August to 25 October. Singles were recorded at Skomer on 7 July 1986, at Strumble Head on 1 November 1987 and at the Smalls on 2 November 1982.

1984-88
Breeding confirmed8
Breeding probable10
Breeding possible3
No of tetrads occupied21 (of 478)
Percentage of tetrads4.4%

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

LLOYD, B. 1925—1939. Diaries. National Library of Wales

More about the Reed Warbler in Pembrokeshire

Reed Warbler

Acrocephalus scirpaceus – TELOR Y CYRS – Breeding summer visitor and passage migrant. Not recorded from December to March