Data files for the Behavioral Ecology paper "Innovative females are more promiscuous in great tits (Parus major)" by Veronika Bókony, Ivett Pipoly, Krisztián Szabó, Bálint Preiszner, Ernő Vincze, Sándor Papp, Gábor Seress, Tamás Hammer & András Liker. Contact: Veronika Bókony, bokony.veronika_at_agrar.mta.hu *** Bokony_et_al_BEHECO_2016_1.csv contains the data necessary for most analyses in the paper, including behavioral measurements and extra-pair paternity: nestbox = within-site ID of the nest box site = name of the nest box plot test.type = type of the behavioral test (neophobia / obstacle removal / food extraction) test.date = date of the behavioral observation test.start = start of the behavioral observation observation.type = the method of observation (telescope / camera on tripod / camera on nest box / hidden camera on nest box) solver.sex = sex of the solver parent (female / male / none) solving.latency = time (sec) elapsed from first arriving on the nest box until the solver parent solved the task (1800 sec if none solved) male.neophobia = time (sec) elapsed from the start of the neophobia test until the male first entered the nest box (1800 sec if it did not enter) female.neophobia = time (sec) elapsed from the start of the neophobia test until the female first entered the nest box (1800 sec if it did not enter) EPP = whether or not the brood contained extra-pair offspring (yes / no) EPO = number of extra-pair offspring in the brood WPO = number of within-pair offspring in the brood firsteggdate = lay date of the first egg (number of days since 1st April) relatedness = coefficient of relatedness between the male and female parent male.tarsus = male tarsus length (mm) male.age = male age (1+ if not known, 2 if first-year, 2+ if older than first year) male.trapped = whether or not the male was trapped in the nest box a few days before the behavioral observations (yes / no) broodsize.at.test = number of chicks on the day of behavioral observation male.feeding = number of feeding visits by the male during the 30-minutes control observation preceding the behavioral test *** Bokony_et_al_BEHECO_2016_2.csv contains the data necessary for comparing the body size of EPO and WPO: nestbox = within-site ID of the nest box site = name of the nest box plot chick.ID = ring number of the chick EPO = whether or not the chick is extra-pair offspring (yes / no) measure.date = date of ringing, when the chick was measured measure.time = time of day of ringing & measurement chick.age = age of the chick at ringing & measurement tarsus = chick's tarsus length (mm) bodymass = chick's body mass (g) measurer.ID = initials of the person who measured the chick ***