The 12 Important Curlew Area (ICA) boundaries have been drawn up by the members of Gylfinir Cymru / Curlew Wales. Glyfinir Cymru / Curlew Wales is a joint working group between organisations that are committed to Curlew recovery in Wales, including representatives from the government, conservation, farming, and game management sectors.
Some of the original hand drawn maps were passed to British Trust for Ornithology (BTO) to draw, then passed to NRW to finalise. The others were sent to NRW to check. If they were correct they were uploaded to the Gylfinir Cymru / Curlew Wales web site. If they were incorrect, they were sent back to the originator.