Core Microbiome
We identified Class Bacilli , Order Pseudomonadales , FamilyBeijernickiaceae , Genera Sutterella and Eubacterium elegans group, and 27 ASVs as representing the community core microbiota of Kirtland’s Warbler within the full dataset, overlapping at all time periods (Table S4). Thirteen of the 27 core ASVs are members of class Clostridia and nine ASVs are found within genusBacteroides . The remaining core ASVs belong to Phyla Actinobacteria, Proteobacteria, and additional classes within Firmicutes. One ASV is unclassified after Kingdom Bacteria. We also identified a temporal core in the birds sampled at all three sampling points. Individuals retained 18-26 ASVs, present at each sampling period, which represented an average of 25.06% (range: 8.58%-50.00%) of ASVs detected per individual per time point.