The I&M Program's Heartland Network (HTLN) recently completed inventories of vertebrate species and vascular plants at Tallgrass Prairie National Preserve (TAPR). In doing so, all existing data were cataloged, targeted field investigations were conducted, and species lists were certified by taxonomic experts. The primary goal of this efforts was to document at least 90% of the vertebrate and vascular plant species believed to occur in the park. This report provides a summary of results.