Spatial prioritization for species recovery programmes needs to be evidence based, and it may be better to target effort in certain parts of a species rangeB but I'm struggling to find examples where interventions have been applied with good spatial replication across a species range. Agri-environment schemes perhaps provide the best opportunity for such studies. Maybe there are other interventions applied across big areas, that have been monitored and assessed (both the level of intervention and the animal/plant population response).