Table 1.
The frequencies of individual repeated observations of parental care of Lundy sparrow males tending to their broods between 2004 and 2015.
Fig 1.
A Male parental care per hour in relation to his relatedness to the brood he cares for. B Male parental care in relation to the difference between an observation and the average relatedness of the respective male to the chicks he cares for. This standardized variable represents variation within individuals. Larger values represent a lower relatedness between the male and his brood. The hinges represent the first and third quartiles, the thick line is the mean, and the dots represent single observations outside of the hinges.
Table 2.
Results from a linear mixed model.
Chick age and the number of hatchlings were standardized to a mean of 0 and variance of 1. The treatment refers to the degree of which the chicks were related to the attending male (low = high relatedness, high = low relatedness). N = 2388 observations of parental care between 2004 and 2015, on 1048 broods and 299 individual males.