...to gain a detailed understanding of the genomic background of the organisms that we investigate on various levels. Individual sequencing data not only provide access to the complete genomic inventory of our focal study species, but further facilitates the development of a strong molecular toolset. This enables us to identify regions in the genome that show variation with relevance for the behavioural phenotype, characterise variability and functional relevance of particular candidate loci along the genome, and beyond that open the opportunity to evaluate and interpret our findings in an evolutionary framework. This is particularly exciting in night-migratory songbirds where a strong genetic component of migratory behaviour has been demonstrated.