Conserving Black Grouse Lyrurus tetrix in southern Scotland: evidence for the need to retain large contiguous moorland habitat within a forest-moorland landscape
Warren, P., Land, C., Hesford, N., & Baines, D.
2020. Bird Study, 1-9.doi:10.1080/00063657.2020.1726875.
Population estimates of birds in Great Britain and the United Kingdom
Woodward, I.D., Aebischer, N.J., Burnell, D., Eaton, M.A., Frost, T., Hall, C., Stroud, D.A., & Noble, D.G.
2020. British Birds, 113: 69-104.
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