Read Me for BD_beta_bka_Schmitt: This file contains the data used in the article "Linking innate immunogenetic variation with phenotypic traits in a wild population of tree swallows, Tachycineta bicolor." published in the Biological Journal of the Linnean Society by C. Schmitt et al. The file contains 4 spreadsheets: the first and second contain data of male and female tree swallows collected during the summer 2013 and 2014, with innate immunity (BKA), and beta-defensin genes as well as fledging sucess. The first spreadsheet contains beta-defensin alleles using only non-synonymous SNPs whereas the second spreadsheet contains only data with synonymous SNPs. The last 2 spreadsheets are data of female tree swallows in 2014 with their beta-defensin alleles, and the data on eggshell bacteria load of their clutch, as well as hatching success. agri_lvl: agricultural categories, with intensive (Int) and non-intensive (Ext) ctrl_Ecoli: number of CFU control bino_BKA90: transformed variable from BKA_Ecoli where BKA>90% is 1 and <90% is 0. het_all: overall heterozygosity calculted with the 6 beta-defensin genes haplo: haplotype geno: genotype and the number of the gene geno_small: the same variable as "geno" but some categories removed het: heterozygosity status of the gene