| 1970, Oct | Present |
J.M.Chalmers-Hunt |
Not recorded |
Grwyne Fawr |
SO2822 |
Unknown |
Not recorded |
| | 1986, Oct | Present |
N.R.Lowe |
Not recorded |
Talybont Reservoir |
SO1020 |
Unknown |
Not recorded |
| | 1987, Nov | Present |
N.R.Lowe |
Not recorded |
Nant Sere |
SO0323 |
Unknown |
Not recorded |
| | 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 |
| | 1992, Sep | Present |
N.R.Lowe |
Not recorded |
Craig Cerrig-gleisiad NNR |
SN9622 |
Unknown |
Not recorded |
| | 1995, Oct | Present |
N.R.Lowe |
Not recorded |
Llangorse |
SO139276 |
Unknown |
Not recorded |
| | 1995, Oct | Present |
N.R.Lowe |
Not recorded |
Waun-y-mynach |
SO094297 |
Unknown |
Not recorded |
| | 2001, Oct | 1 |
J.M.&P.M.Rees |
Mine (vacated) |
Legar |
SO216178 |
Leaf mine |
Not recorded |
| | 2003, Oct | Present |
N.R.Lowe |
Mine |
Penderyn |
SN948079 |
Daytime observation |
Resident |
on Betula | | 2003, Nov | 1 |
N.R.Lowe |
Mine (vacated) |
Llangorse |
SO136275 |
Daytime observation |
Resident |
| | 2004, Sep | 1 |
J.R.Langmaid&N.R.Lowe |
Mine (vacated) |
Corngafallt |
SN9364 |
Daytime observation |
Not recorded |
Betula | | 2005, Sep | 1 |
J.R.Langmaid |
Mine (vacated) |
Talybont Forest |
SO0617 |
Daytime observation |
Not recorded |
Betula | | 2005, Oct | 1 |
J.R.Langmaid&N.R.Lowe |
Mine (vacated) |
Henallt |
SO2340 |
Daytime observation |
Not recorded |
Betula | | 2006, Aug | 1 |
J.R.Langmaid |
Mine (vacated) |
Hay Forest |
SO1936 |
Daytime observation |
Not recorded |
Betula | | 2006, Aug | Present |
J.R.Langmaid&N.R.Lowe |
Mine (vacated) |
Coed Fenni-fach |
SO0128 |
Daytime observation |
Not recorded |
several Betula |
|