Figure 1 : Phylogenetic relationships of the avian taxa from which we obtained fecal and preen samples. The phylogenetic tree was made using Vertlife.org. The circle indicates a preen oil sample was collected from that species and the square indicates a fecal sample was collected from that species. The number of PCR rounds run on the original extracted DNA to successfully see a band on a 2% agarose gel is indicated by the color and pattern within each circle or square. The V3-V4 region of the microbial 16S rRNA gene successfully amplified from all but one of the DNA extracts we generated using our method.