YR = Year

NY = Nest ID on each year

EG1 = Experimental group category until the day of hatching of the first egg

EG2 = Experimental group category after the day of hatching of the first egg

FD = Nest failure (1 = failed; 0 = non failed)

CS = Clutch size

D0-31 = Number of eggs in the nest from day 0 (first laying date) to estimated mean hatching date (day 31)

AGE1-15 = Sum of eggs and nestlings in the nest from hatching day 0 (hatching date of the first nestling) to first nestling age 15