|Site types that use this protocol||
Most of the changes in breeding numbers of moorland birds seem to stem from differences in habitat conditions, weather conditions and food availability, though much debate persists about the additional or compounding effects of predation, parasitism and disease. The methodology described below provides a well-tested means of assessing numbers of breeding birds on moorland.
Note: This protocol is no longer compulsory at moorland ECN sites. The Breeding Bird Survey protocol (BB) is now used instead.