Widespread over the higher parts of the country, especially the most wooded areas. Distribution in the lowlands is mainly confined to urban habitat (gardens, parks), marshland (if partly covered by wood) and coastal dunes. Densities are difficult to assess and partly influenced by observer-effort. Following an increase in suitable habitat in the lower parts of the country, Long-tailed Tits have colonised many formerly vacant areas in the north and west from the 1970s onwards. Numbers increased in farmland and coastal dunes, but remained fairly stable in woodland on the higher grounds. About 30,000-40,000 bp in 1998-2000.