Coding Sheets

Select the reference sheet you would like to display:

OBSERVED
X Species observed during its breeding season, but not in suitable nesting habitat (no breeding evidence found).
POSSIBLE
H Species observed in suitable nesting habitat during its breeding season.
S Individual singing or producing other sounds associated with breeding (e.g., calls or drumming) in suitable nesting habitat during the species' breeding season.
PROBABLE
M At least 7 individuals singing or producing other sounds associated with breeding (e.g., calls or drumming), heard during the same visit to a single square and in suitable nesting habitat during the species' breeding season.
P Pair observed in suitable nesting habitat during the species' breeding season.
T Presumed territory based on the presence of an adult bird, whether producing sounds associated with breeding (e.g., song, other calls or drumming) or not, at the same place, in suitable nesting habitat, on at least two visits, one week or more apart, during the species' breeding season.
D Breeding behaviour involving a male and female (e.g., display, courtship feeding and copulation) or antagonistic behaviour between two or more individuals (e.g., territorial disputes or chases), in suitable nesting habitat during the species' breeding season.
V Bird visiting a probable nest site in suitable nesting habitat during the species' breeding season.
A Agitated behaviour or alarm call of an adult in suitable nesting habitat during the species' breeding season.
B Brood patch or cloacal protuberance on an adult individual caught in suitable nesting habitat during the species' breeding season.
N Nest-building by wrens or nest hole excavation by woodpeckers.
CONFIRMED
NB Nest building, including the carrying of nesting material, by all species except wrens and woodpeckers.
DD Individual attempting to draw attention away from a nest or young by feigning injury or by using any other distraction display.
NU Empty nest used during the atlas survey period, or the shells of eggs laid during the same period.
FY Recently fledged (nidicolous species) or downy (nidifugous species) young incapable of sustained flight.
AE Adult occupying, leaving or entering a probable nest site (visible or not) and whose behaviour suggests the presence of an occupied nest.
FS Adult carrying a fecal sac.
CF Adult carrying food for young.
NE Nest containing one or more eggs.
NY Nest with one or more young (seen or heard).
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