| 1977, Sep | Present |
H.G.Parker |
Not recorded |
Pont-ar-dulas |
SN945532 |
Unknown |
Not recorded |
| | 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) |
Pont ar Hydfer |
SN8527 |
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 |
Not recorded |
Cae Bryn Tywarch |
SN852268 |
Unknown |
Not recorded |
| | 1990, Sep | Present |
N.R.Lowe |
Not recorded |
Waun-y-mynach |
SO094297 |
Unknown |
Not recorded |
| | 2005, Sep | Present |
J.R.Langmaid |
Mine (vacated) |
Buckland Hill,Bwlch |
SO1421 |
Daytime observation |
Not recorded |
a few + cut-outs Betula pubescens | | 2006, Aug | Present |
J.R.Langmaid |
Mine (vacated) |
Garwnant Visitor Centre |
SN9913 |
Daytime observation |
Not recorded |
a few + cut-outs Betula | | 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 | 1 |
J.R.Langmaid |
Mine (vacated) |
Hay Forest |
SO1936 |
Daytime observation |
Not recorded |
cut-out Betula pubescens | | 2007, Oct | 2 |
J.R.LangmaidN.R.Lowe&A.D. Lewis |
Mine (vacated) |
Capel Horeb Quarry NR |
SN8432 |
Daytime observation |
Not recorded |
|
|