Аннотация:For more than 30 years, the PARUS program has implemented annual censuses of wintering birds across a network of model sites in the European Russia forest zone. The scheme is run mostly by volunteers who make transect counts; it enables the estimation of bird population density in typical forest habitats. We present an analysis of wide-scale population trends in forest habitats using TRIM software for 17 common birds. Between 1988 and 2019, seven species had decreasing trends, populations of nine species were stable, and none showed a significant increase. Species associated with coniferous trees had a more pronounced decline in comparison to generalist species; declines were most dramatic for Goldcrest Regulus regulus, Willow Poecile montanus and Coal Tits Periparus ater. Similar tendencies were reported with monitoring schemes in neighbouring countries. We suppose that main negative factor was intense logging in boreal forests; climate change could also play a role.
