StudySite: name of the study site
Nestbox: Unique ID for each nestbox
LayingDate: Julian date of laying of the first egg
Treatment: The treatment of the nestbox (control or heated, see the article)
IncubDate: Julian date of the start of incubation
LastEgg: Julian date of laying of the last egg
Clutchsize: Total number of eggs laid
FinalClutchsize: Total number of eggs incubated
HatchingDate: Julian date of hatching of the first chick in the nestbox
Hatchling: Number of hatchlings
EggNotHatched: Number of eggs unhatched
Fledgling: Number of fledglings
N_Egg_Coll_Analysed: Number of eggs collected and analyzed
Remarks