Corncrake national surveys - territory centres

At the beginning on the 20th century, Corncrakes still bred all over the UK, but by the early 1990 they were restricted to a few Scottish islands. Through conservation effort from the Royal Society for the Protection of Birds (RSPB), other conservation organisations (NTS,SWT), NatureScot, the decline was reversed from the low point of the 1990’s. This dataset contains Corncrake records from all annual surveys of Corncrake since 1988, monitoring the increase in Corncrake numbers since 1993 until 2014. Since 2014 the numbers have dropped by 30%. These surveys have been funded mainly by NatureScot and RSPB, but also by other partners in SCARABBS (Statutory Conservation Agencies and RSPB Breeding Birds Scheme) and other conservation partners e.g. NTS. For each year, the dataset contains all locations of singing males, recorded on multiple visits to each area covered. Multiple observations of the same male are labelled with a unique code for that male (calls heard on separate occasions less than 200m apart are assumed to be the same bird). For all years since 1993, territory centres for each male, calculated from these observations, are provided in the dataset annual Corncrake surveys in Britain (territory centres).