Grey Heron / Cryr Glas

Ardea cinerea

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Contains Ordnance Survey data
© Crown copyright and database right 2013

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

Breeding 1968-72

Status

Hectads


Possible

0


Probable

1

6%


Confirmed

2

12%


Total

3

18%


Winter 1981/82-1983/84

Status

Hectads


Present

15

88%


Breeding 1984-89

Status

Tetrads


Present

0


Possible

33

8%


Probable

10

2%


Confirmed

3

1%


Total

46

11%


Winter 2007/08-2010/11

Status

Tetrads


Present

214

53%


Breeding 2008-11

Status

Tetrads


Present

148

36%


Possible

24

6%


Probable

2

<1%


Confirmed

13

3%


Total

187

46%