Black grouse leks are spectacular communal display grounds where male welfare is closely linked to habitat quality and disturbance management in upland Britain.
Black grouse at leks are energetically committed to display behaviour and highly vulnerable to disturbance during this critical period. Flushed birds expend significant energy escaping and may fail to return, reducing breeding success. Males in poor condition due to habitat degradation enter the lek season at a disadvantage, increasing stress during competitive display. Females selecting mates in degraded habitat have lower nesting success and chick survival rates.