A team of authors from the RSPB report on a national survey of breeding Cirl Buntings in 2009, which recorded an estimated 862 territories in 136 occupied tetrads. These were confined largely to south Devon, but a small population now exists in Cornwall as a result of an ongoing reintroduction project. From the lows of the 1980s, the UK Cirl Bunting population continues to recover, both in terms of abundance and distribution. Between 2003 and 2009, the population estimate increased by 24% and the number of occupied tetrads by 15%. However, there is little evidence to suggest that the species is naturally recolonising areas beyond its core range in south Devon.
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