Among the Estonian multispecies indices, the woodland bird index shows a steady increase until 2000, followed by a moderate negative trend in 2001-2006, and a sharp decline in 2007-2010. The farmland bird index largely follows the woodland bird index, but shows two distinctive declines in 1994-1996 and in 2007-2010. The species that contributed most to the 2007-2010 declines were Tringa totanus, Motacilla flava, Crex crex, Passer montanus, Motacilla alba, Columba palumbus, Delichon urbicum, Locustella naevia, Acrocephalus schoenobaenus, Parus palustris, Loxia curvirostra, Sitta europaea, Parus cristatus, Dendrocopus major, Oriolus oriolus, Dendrocopus minor, Nucifraga caryocatactes, Parus montanus.
Andres Kuresoo, Hannes Pehlak, and Renno Nellis. Population trends of common birds in Estonia in 1983-2010. Estonian Journal of Ecology, 2011, 60, 2, 88-110 (attached)