Survey tetrads (2x2km) will be chosen based on a stratified random design from across their range, based on:
- non-random, self-selected squares in core areas, mostly around existing monitoring/intervention efforts,
- random sampling of occupied tetrads, from 2007-11 Atlas and later (high intensity),
- random sampling of remaining tetrads in occupied 10km squares, from 2007-11 Atlas and later (medium intensity), and
- lower intensity sampling through the rest of the known range, from the 1988-91 Atlas.
Data from the 1988-91 and 2007-11 bird atlases, recent county atlases and from the RBBP are being used to identify the areas of sampling intensity.
Printable maps
The following tetrads have been selected for survey work in our region. Follow links to print out a tetrad.
| Tetrad | Place | Volunteer | Map |
| SN90M | Hirwaun | Allocated | download map |
| SN90Z | Onllwyn forestry | Allocated | download map |
| SN91X | Nant-ddu (west) | Allocated | download map |
| SN91Z | Beacons Reservoir | Allocated | download map |
| SO00A | Aberaman | Allocated | download map |
| SO00E | Penmoelallt | Allocated | download map |
| SO00F | Cwmbach | Allocated | download map |
| SO00I | Gellideg | Vacant | download map |
| SO00J | Cefn-coed-y-cymmer (north) | Vacant | download map |
| SO00K | Cwmpennar | Vacant | download map |
| SO00L | Mynydd Gethin | Allocated | download map |
| SO00Y | Rhaslas Pond | Vacant | download map |
| SO01A | Llwyn-on Reservoir Dam | Allocated | download map |
| SO01I | Lower Neuadd Reservoir (south) | Allocated | download map |
| SO01M | Pentwyn Reservoir | Allocated | download map |
| SS59F | Park Woods | Allocated | download map |
| SS59M | Pen-clawdd | Vacant | download map |
| SS69B | Killay | Allocated | download map |
| SS69J | Valley Wood | Vacant | download map |
| SS69M | Cwmdu | Vacant | download map |
| SS78Y | Margam | Allocated | download map |
| SS79C | Llandarcy | Allocated | download map |
| SS79Y | Cefn Morfudd | Allocated | download map |
| SS88A | North Cornelly (west) | Vacant | download map |
| SS88F | North Cornelly (east) | Vacant | download map |
| SS88H | Troed-y-rhiw | Allocated | download map |
| SS88N | Cwm Cynffig | Allocated | download map |
| SS88Q | Llangewydd | Vacant | download map |
| SS88U | Llangynwyd | Vacant | download map |
| SS89D | Mynydd Blaenafon | Allocated | download map |
| SS89D | Tonmawr | Allocated | download map |
| SS89J | Tyle’r’waun | Allocated | download map |
| SS89U | Glyncorrwg | Allocated | download map |
| SS98X | Llanbad | Vacant | download map |
| ST08C | Llantrisant Forest | Allocated | download map |
| ST08V | Creigiau | Allocated | download map |
| ST08X | Efail Isaf | Allocated | download map |
| ST09F | Porth | Allocated | download map |
| ST09I | Llanwonno | Allocated | download map |
| ST09J | Fernhill | Vacant | download map |
| ST09N | Perthcelyn | Vacant | download map |
| ST09R | Glyncoch | Allocated | download map |
| ST18F | Forest Farm | Allocated | download map |
| ST18J | Abertridwr | Vacant | download map |
| ST18L | Coed-y-wenallt | Allocated | download map |
| ST18V | Cyncoed | Vacant | download map |
| ST19F | Senghenydd | Vacant | download map |
| ST19H | Parc Penallta | Allocated | download map |
| ST28C | Cefn Mably Woods | Allocated | download map |
| ST28F | St Mellons | Allocated | download map |
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