A1
Species observed in breeding season in possible nesting habitat
A2
Singing, drumming or displaying male present in breeding season in possible nesting habitat
B3
Pair observed in suitable nesting habitat in breeding season
B4
Territorial behaviour (song, fights with neighbour etc.) on at least two different days a week or more apart at same place indicating a permanently occupied territory
B5
Courtship and display (male and female) observed
B6
Adult visiting a probable nest-site
B7
Agitated behaviour or anxiety calls from adults, indicating a nest or young nearby
B8
Brood patch on adult examined in the hand
B9
Nest-building or excavating of nest-hole observed
C10
Distraction-display or injury-feigning observed
C11a
Used nest found (occupied within period of survey)
C11b
Eggshells found (laid within period of survey)
C12
Recently fledged young (nidicolous species) or downy young (nidifugous species) observed
C13a
Adults entering or leaving nest-site in circumstances indicating occupied nest (including high nests or nestholes, the contents of which cannot be seen) or adult seen incubating
C13b
Nest with breeding adult observed
C14a
Adult carrying faecal sac of young
C14b
Adult carrying or food for young
C16
Nest with young seen or heard.
Only if not any case above is applicable
E99
Species not recorded (anymore) despite severals visits to the site