Composite indicator of bird populations
Bird populations are relatively well studied and can provide an indication of the changing biodiversity of Scotland's habitats. The index for the 68 terrestrial breeding bird species showed a long term increase in the index of abundance by ten index points between 1994 to 2006, however the index of abundance decreased by nine index points between 2005 and 2006. The number of waterbirds rose between the mid 1980s and mid 1990s and subsequently has stayed relatively stable. Seabird numbers fell by one third between 1991 and 2004.
Source: BTO, JNCC, RSPB, WWT
Further Information
Last updated: September 2008