1. Counts of male Black Grouse Tetrao tetrix in North Wales.;Cayford;Bird Study,1991
2. Adaptedness of arena behaviour in Black Grouse (Tetrao tetrix) and other grouse species (Tetraonidae).;DeVos;Behaviour,1978
3. Changes in Black Grouse Tetrao tetrix densities in the French Alps.;Ellison;Gibier Faune Sauvage,1985
4. Seasonal differences in the courting activity of Black Grouse (Lyrurus tetrix L.;Gremmels;1758) as observed in a flight cage. Z. Jagdwiss.,1990
5. Behaviour of the Black Grouse Lyrurus tetrix (L.) during spring display.;Koivisto;Finn. Game Res.,1965