Grasshopper Warbler / Troellwr Bach

Locustella naevia

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Contains Ordnance Survey data
© Crown copyright and database right 2013

SN90 - Aberdare (Probable breeding) SO00 - Merthyr Tydfil (Probable breeding) SS87 - Porthcawl (Probable breeding) SS88 - Pyle (Confirmed breeding) SS96 - Llantwit Major (Probable breeding) SS97 - Bridgend (Probable breeding) SS98 - Pencoed (Confirmed breeding) SS99 - Rhondda (Probable breeding) ST06 - Roose (Probable breeding) ST07 - Ely Valley (Probable breeding) ST08 - Llantrisant (Confirmed breeding) ST09 - Abercynon (Probable breeding) ST16 - Barry (Confirmed breeding) ST17 - Cardiff West (Probable breeding) ST18 - Caerphilly (Confirmed breeding) ST19 - Ystrad Mynach (Possible breeding) ST27 - Cardiff East

Distribution map species lists

Breeding change maps

Species richness maps

© 2014 Glamorgan Bird Club

Breeding 1968-72

Status

Hectads


Possible

1

6%


Probable

10

59%


Confirmed

5

29%


Total

16

94%


Winter 1981/82-1983/84

Status

Hectads


Present

0


Breeding 1984-89

Status

Tetrads


Present

3

1%


Possible

4

1%


Probable

1

<1%


Confirmed

1

<1%


Total

9

2%


Winter 2007/08-2010/11

Status

Tetrads


Present

1

<1%


Breeding 2008-11

Status

Tetrads


Present

24

6%


Possible

28

7%


Probable

9

2%


Confirmed

1

<1%


Total

62

15%