Transmission of maternal aggression in canaries requires direct mother-daughter interaction

The dataset (GarciaCo_2026_MA_TT_data.xlsx) contains three sheets: - CF_daughters (n = 44): one row per cross-fostered daughter, with the MA phenotypes of her biological and foster mothers, her own MA phenotype when she later bred, whether she was herself plucked as a nestling, and covariates (brood size, breeding year). Primary dataset for the cross-fostered transmission analysis and the concordant subset of the comparison analysis. - NonCF_daughters (n = 30): one row per non-cross-fostered daughter, for whom the biological and rearing mother are the same individual.

Includes the mother's MA phenotype, the daughter's own MA phenotype, her origin (2022 baseline cohort or repeated-breeding cohort), and covariates. Primary dataset for the non-cross-fostered transmission analysis. - Consistency_females (n = 32): one row per female recorded across two consecutive breeding seasons (a cross-fostered season followed by a non-cross-fostered season), used to assess within-female consistency of MA.

Full variable definitions, sample-size derivations, and analysis notes are provided in the accompanying README file (GarciaCo_2026_MA_TT_README.txt). Missing values (NA) indicate variables that were not applicable or could not be recorded; rows for which MA could not be assessed (no nestling surviving to day 14) were excluded from the analysis datasets. The annotated analysis code (GarciaCo_2026_MA_TT_analysis.Rmd) reproduces every statistical result reported in the associated manuscript from this data file.