Mistle Thrush – 2003-07 breeding

Turdus viscivorus – BRYCH Y COED – Breeding resident

Comparison with previous atlas:

1984-882003-07
Breeding confirmed89131
Breeding probable68118
Breeding possible5727
No of tetrads occupied214 (of 478)276 (of 490)
Percentage of tetrads44.8%56.3%

The 1984-88 survey found Mistle Thrushes to be more numerous in the south and north east of the county than elsewhere. The 2003-07 survey shows a much more even distribution across the whole area, other than remaining thinly spread in the far west, over all amounting to a 29% increase. The BBS calculated a 6% increase in Wales between 1994 and 2007. Applying this to the 2003-07 records for Pembrokeshire suggests a breeding population of about 1,900 pairs compared to the estimate of 1,400 pairs during the previous survey.

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 Mistle Thrush in Pembrokeshire

Mistle Thrush – 1994

Turdus viscivorus – BRYCH Y COED – Breeding resident

1984-88
Breeding confirmed89
Breeding probable68
Breeding possible57
No of tetrads occupied214 (of 478)
Percentage of tetrads44.8%

Both Mathew (1894) and Lockley et al. (1949) regarded the Mistle Thrush as a common resident. The Breeding Birds Survey of 1984-1988 found Mistle Thrushes to be more numerous south of the Cleddau Estuary and in north-east Pembrokeshire than elsewhere, where they were sparse. At an estimated ten pairs per tetrad in the main areas and two pairs per tetrad elsewhere, the population would probably be about 1,400 pairs.

They flock from July onwards, in groups varying from five to twenty birds, but over 100 were at Skomer on 3 October 1983 and an estimated 500 appeared on Ramsey on 12 October 1972. Flocks disappear before the winter and Mathew considered that they migrated south. He was probably right but we have found no direct evidence to confirm this.

The Mistle Thrush is generally sparsely distributed during the winter, some territories becoming deserted, while in others residents firmly defend well-berried trees.

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

More about the Mistle Thrush in Pembrokeshire

Mistle Thrush – 1980s winter

Turdus viscivorus – BRYCH Y COED – Breeding resident

The BTO winter atlas showed that Mistle Thrushes were present in the majority of 10km squares during the winters of 1981-82, 1982-82 and 1983-84.

The darker the colour, the higher the relative total count for each 10km square.  The darkest blue represents over 15 birds seen in a day.

Graham Rees. Pembrokeshire County Bird Recorder 1981-2007

Data collected by volunteers for the BTO. Lack, P. 1986 Atlas of wintering birds in Britain and Ireland. T & A.D. Poyser.

More about the Mistle Thrush in Pembrokeshire

Mistle Thrush – 1894

Turdus viscivorus

Although not so numerous as it has become of late years in some English counties, this fine Thrush is fairly common as a resident throughout Pembrokeshire. There were always several nests in our grounds at Stone Hall, the birds frequently selecting some tree close to one of the paths, from which they would angrily scold the passer by. About the middle of July these Thrushes flock, and soon after the majority disappear, having migrated south. We have seen the broods of young birds in our kitchen garden, helping the Blackbirds in their raids upon the fruit. The beautiful eggs of the Mistle Thrush occur in two varieties, one in which the red markings are on an apple green ground, the other having a ground of creamy white.

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

More about the Mistle Thrush in Pembrokeshire

Mistle Thrush

Turdus viscivorus – BRYCH Y COED – Breeding resident

Mistle Thrush – 2003-07 breeding

Turdus viscivorus – BRYCH Y COED – Breeding resident Comparison with previous atlas: 1984-88 2003-07 Breeding confirmed 89 131 Breeding probable 68 118 Breeding possible 57 27 No of tetrads occupied 214 (of 478) 276 (of 490) Percentage of tetrads 44.8% 56.3% The 1984-88 survey found Mistle Thrushes to be more numerous in the south […]

Mistle Thrush – 1994

Turdus viscivorus – BRYCH Y COED – Breeding resident 1984-88 Breeding confirmed 89 Breeding probable 68 Breeding possible 57 No of tetrads occupied 214 (of 478) Percentage of tetrads 44.8% Both Mathew (1894) and Lockley et al. (1949) regarded the Mistle Thrush as a common resident. The Breeding Birds Survey of 1984-1988 found Mistle Thrushes to be […]

Mistle Thrush – 1980s winter

Turdus viscivorus – BRYCH Y COED – Breeding resident The BTO winter atlas showed that Mistle Thrushes were present in the majority of 10km squares during the winters of 1981-82, 1982-82 and 1983-84. The darker the colour, the higher the relative total count for each 10km square.  The darkest blue represents over 15 birds seen in a […]

Mistle Thrush – 1894

Species account from the 1894 ‘Birds of Pembrokeshire and its Islands’ by Rev M A Mathew