YR = Year 

NY = Nest ID on each year

SG = Synchronous group

EG = Experimental group

JD = sampling date (day 1 = Jan 1)

MTN = Maximum temperature in the nest (Tnest; Celsius)

MTA = Maximum ambient temperature (Tair; Celsius)

ST = Stage, corresponding to the breeding period (Incubation; Rearing; Heatwave)