What is a microbiome? Within each bird there are communities of micro-organisms that interact with each other, the host bird, and the environment. This community is known collectively as the microbiome. Kirtland’s Warblers offer a unique opportunity to understand how the changing environments of migratory birds impact the composition of the microbiome. In her presentation, Heather Skeen, of the Integrative Research Center at the Field Museum will describe research centered around the microbiomes of individual Kirtland’s Warblers that were tracked using geolocators from The Bahamas to Michigan.