| 1980, Sep | Present |
J.R.Langmaid,A.M.Emmet&J.D.Bradley |
Mine (vacated) |
Llanwrthwl |
SN9763 |
Daytime observation |
Not recorded |
a few | | 1990, Sep | Present |
J.R.Langmaid,A.M.Emmet,P.H.Sterling&N.R. Lowe |
Mine (vacated) |
Waun-y-mynach |
SO0929 |
Daytime observation |
Not recorded |
several | | 1990, Sep | Present |
N.R.Lowe |
Mine |
Waun-y-mynach |
SO094297 |
Daytime observation |
Resident |
| | 2004, Sep | Present |
J.R.Langmaid&N.R.Lowe |
Mine (vacated) |
Corngafallt |
SN9364 |
Daytime observation |
Not recorded |
several with cut-outs Betula | | 2005, Oct | Present |
J.R.Langmaid&N.R.Lowe |
Mine (vacated) |
Henallt |
SO2340 |
Daytime observation |
Not recorded |
a few + cut-outs Betula | | 2005, Sep | Present |
J.R.Langmaid |
Mine (vacated) |
Buckland Hill,Bwlch |
SO1421 |
Daytime observation |
Not recorded |
a few + cut-outs Betula pubescens | | 2006, Aug | 1 |
J.R.Langmaid |
Mine (vacated) |
Garwnant Visitor Centre |
SN9913 |
Daytime observation |
Not recorded |
| | 2006, Aug | Present |
J.R.Langmaid&N.R.Lowe |
Mine (vacated) |
Coed Fenni-fach |
SO0128 |
Daytime observation |
Not recorded |
a few + cut-outs Betula | | 2006, Aug | Present |
J.R.Langmaid |
Mine (vacated) |
Hay Forest |
SO1936 |
Daytime observation |
Not recorded |
a few + cut-outs Betula | | 2006, Sep | Present |
J.R.Langmaid |
Mine (vacated) |
Hay Forest |
SO1936 |
Daytime observation |
Not recorded |
cut-outs Betula pubescens | | 2007, Oct | Present |
J.R.LangmaidN.R.Lowe&A.D. Lewis |
Mine (vacated) |
Llywel |
SN8729 |
Daytime observation |
Not recorded |
a few + cut-outs: Betula pubescens | | 2007, Oct | Present |
J.R.LangmaidN.R.Lowe&A.D. Lewis |
Mine (vacated) |
Capel Horeb Quarry NR |
SN8432 |
Daytime observation |
Not recorded |
many + cut-outs: Betula pubescens | | 2008, Aug | Present |
J.R.Langmaid |
Mine (vacated) |
Brecon - Bwlch - Buckland Hill |
SO1421 |
Daytime observation |
Not recorded |
a few + cut-outs - Betula pubescens | | 2008, Nov | Present |
N.R.Lowe |
Mine (vacated) |
Brecon - Talybont Forest & Reservoir |
SO1019 |
Daytime observation |
Not recorded |
Mine and cut-out on birch |
|