One of our research focusses on the impact of skin microbes on odour production. It is still unclear why genetic similar individuals smell more similar. One possibility is that the skin microbe community, which is potentially invovled in body odour production is shaped by the genotype. As a consequence we expect skin microbe communities or at least part of the communities to be similar across different body regions.
In cooperation with our collaegues from the CeBiTec we confirmed this hypothesis in our first paper and showed that zebra finches, as well as Bengalese finches and diamond firetails show individual specific as well as species specific skin microbe communities. link