Breeding parameters
Area: Location of the study area (PoPlain/Matera)
Nest_ID: Identity of the individual nest
Type: Type of nest (NESTBOX/NATURAL)
Lay_date: Laying date in ordinal numbers (Jan 1 = 1)
Clutch_sz: Maximum number of eggs in the nest during the monitoring visits
Chicks_hatch: Number of nestlings that hatched
Chicks_fledged: Number of nestlings that fledged
Chicks_dead: Number of nestlings that died for reasons other than predation
Chick_Pred: Number of nestlings that were predated
MaxT: Maximum nest temperature reached during the monitoring period

Nest temperatures
Area: Location of the study area (PoPlain/Matera)
Nest_ID: Identity of the individual nest
Type: Type of nest (NESTBOX/NATURAL)
Julian_day: Day of registration in ordinal numbers (Jan 1 = 1)
MaxT: Maximum nest temperature reached during said day
Tout: Maximum air temperature reached during said day

Nestling biometrics
Area: Location of the study area (PoPlain/Matera)
Pull_ID: Identity of the individual nestling
Nest: Identity of the individual nest
Type: Type of nest (NESTBOX/NATURAL)
chick_rank: Hatching rank of the nestling (nestlings hatched first
Jday_Std: mean-centered julian day
age: Age of the nestling at measurement
clutch_size: Maximum number of eggs laid in the nest
weight: body mass of the individual nestlings (g)
MaxT: Maximum nest temperature reached during the monitoring period