Data from: The birth hour of mammals: insights from intra-specific variation in wild blue monkeys

The dataset (Cords_Gometz_2021_Dataset) represents 484 births, one per row. For each birth, the data set includes information on the following variables, listed from left to right. kidDOB: the date of the birth (YYYY-MM-DD); momID: a unique identity code for each mother (note that some mothers have multiple births in this data set) group: the identity (name) of the group in which the birth occurred. A particular mother could give birth in more than one group because some groups fissioned during the study period, and daughter groups received new names; daytimebirth: expresses whether the birth occurred during the daytime (daylight hours), coded 0/1 (no/yes) dies365: expresses whether the infant died within 365 days of its birth, coded 0/1 (no/yes) kidsex: F for female, M for male. Blanks represent missing data (infant not sexed). kidbirthmonth: the month of the birth (1-12 representing January-December) devpeak: binary variable expressing the degree to which the birth month deviated from the population peak of births in January-February; coded 0 if birth month was 0-4 months away from January-December peak (i.e. birth in September through June), or 1 if birth month was 5 months away from peak (births in July-August). Nfems_in_hier: count of the number of adult females in the group, and in the group’s dominance hierarchy, during the year of the birth st_Nfemsinhier: Z-score of previous variable momrank: mother’s dominance rank, expressed on a scale from 0 (lowest) to 1 (highest). Ranks were assigned for each group and year based on the outcome of decided dyadic agonistic encounters among the group’s large juvenile and adult females. These are females that turned 5 years old in the year of the birth, or who had turned 5 years old previously. Ranks were computed via the I&SI method, implemented in Domicalc (Schmid and deVries 2013, Animal Behaviour 86: 1097-1105). Publication provides further details. st_momrank: Z-score of the previous variable momageatbirth: mother’s age at the time of the birth (in years) st_momageatbirth: Z-score of the previous variable Cells that are blank represent missing values.