Bird Atlas, Final Breeding Season
April marks the start of recording for the final breeding season of the Project. This year we are looking to complete coverage in those TTV allocations, boost species number counts in those tetrads that currently have low numbers. We are also looking to further collect breeding evidence, especially confirmed breeding evidence wherever possible.
The map below shows tetrad species numbers after three breeding seasons, compiled from records received via the BTO. Records from our own GBC database will supplement this. Over 90% anticipated species richness has been reached in all 10km squares except SS77 and SS96.
How you can help
TTVs (Timed Tetrad Visits)
This is the final chance to complete TTVs. If you’ve been allocated a tetrad, please endeavour to undertake your visits this April-July.
The map highlights areas where we’ve had no or low coverage so far. The table below highlights priority tetrads where we think recorded species number are lower than we expect. Can you survey in these tetrads?
|ST18A||South east of Pentyrch||1||Mainly open farmland|
|SS89R||Mynydd Bach, Maesteg||3||Upland – low count expected?|
|SN90L||Mynydd Bwllfa||4||Upland & conifers. Low count expected?|
|SO00X||Merthyr Common East||4|
|SO00T||Dowlais Top||6||Largely inaccessible. Low count expected.|
|SO01G||West of Ponsticill Res||6||Upland – low count expected?|
|ST19G||Mynydd Eglwysilan||6||Upland – low count expected?|
|ST19L||South of Ystrad Mynach||8||Outside Glamorgan?|
|SO00Z||Gelli-Gaer Common||9||Upland – low count expected?|
|SO00Y||Merthyr Common Mid||10|
|SN91Q||Cefn Cadlan||11||Upland – low count expected?|
|SN90U||Mynydd-y-Glog||12||Upland – low count expected?|
|SN90Z||East of Mynydd-y-Glog||13||Upland – low count expected?|
BTO Atlas Website
Take a look at the Regional Results web pages (accessed from Latest Results) to see which 10-km squares need most help with Roving Records and TTVs. Also look at the ‘Any Square Summary’ pages in Data Home for your nearby 10-km squares and see what species still need to be recorded and what breeding evidence is still required.
Categories of Breeding Evidence
It is very important to record evidence of breeding during the forthcoming survey period. The higher the rating the better of course, but please try to add any of the codes below when collecting your data, even if it is just for suitable nesting habitat or a singing male.
Select a code that best describes what you have seen. Except M and U, all should relate to individuals in potentially suitable nesting habitat. In this final survey period we are also looking to ‘upgrade’ breeding evidence whenever possible, with Confirmed Breeding being the goal.
Details of which species need ‘upgrading’ in each 10km square are available.
|F||Flying over||H||Observed in suitable nesting Habitat|
|Probable breeder||Confirmed breeder|
|P||Pair in suitable nesting habitat||DD||Distraction-Display or injury feigning|
(defended over at least 1 week)
|UN||Used Nest or eggshells found from this season|
|D||Courtship and Display||FL||Recently FLedged young or downy young|
|N||Visiting probable Nest site||NE||Nest containing Eggs|
|A||Agitated behaviour||FF||Adult carrying Faecal sac or Food for young|
|I||Brood patch of Incubating bird
(from bird in hand)
|ON||Adults entering or leaving nest-site in circumstances indicating Occupied Nest|
|B||Nest Building or excavating nest-hole||NY||Nest with Young seen or heard|
Where possible, we need to record crepuscular and nocturnal species. As a result we are keen to encourage volunteers to make evening visits to 10-km squares/tetrads to record owls, Nightjars, Grasshopper Warblers, Water Rails etc.