These data were collected to monitor population levels in the Argyll & Bute area as part of the Black Grouse Recovery Project. Priority sites were identified for Black Grouse Tetrao tetrix conservation in the Argyll & Bute area. These priority sites were identified by surveying known (both historical and current) leks in Argyll & Bute between 2002 and 2011.

The recovery project was funded by a partnership of Scottish Natural Heritage, Forestry Commission Scotland, RSPB Scotland, Scottish Power and an award from the Esm饠Fairbairn Foundation. In 2008 additional survey work was organised and funded by RSPB.

Absence records are included, and denote areas that were surveyed where no black grouse were seen.

LNRs are established in a variety of locations with very varied habitats and species. They must lie wholly within the area of jurisdiction of the local authority which declares them to be reserves. Prior to such declaration, the local authority must own or lease the site or obtain an agreement from the owner. LNRs are generally smaller than NNRs and closer to centres of population. They are frequently provided for the enjoyment and education of local people whose involvement in site management is encouraged.