The maps below show the level of tetrad allocation attained so far in winter and the breeding season during 2007-11. Dots indicate 10km squares with differing levels of allocation. No colour/white indicates no tetrads allocated at all for that 10km square; Yellow indicates less than eight tetrads allocated; Orange indicates eight or more allocated; Red indicates 100% allocation for that 10km square. Our aim is to colour all parts of the map in orange or red. To help make that a reality go to the main Atlas pages for more detailed descriptions of the Atlas survey and mapping methods.