Twenty-five years after the publication of the state's first breeding bird atlas, The Second Atlas of Breeding Birds in Ohio brings our knowledge of the state's bird populations up to date and provides important new information. The Atlas documents the current distribution and changes in status for more than two hundred bird species in Ohio, including five new breeding species and five species not known to have bred in over fifty years. More than nine hundred dedicated birdwatchers completed surveys of birds across the state from 2006 to 2011. Additionally, trained staff collected new data on bird abundance using point-count surveys. These counts tabulated not only species but individual birds as well, enabling precise estimates of the actual statewide populations for many of the breeding species detected. In all, more than one million bird records were compiled by birders and professional researchers for the second Atlas, providing an unprecedented snapshot of the bird life of Ohio. Matthew Shumar will discuss how information generated from the Atlas is providing important insight into factors driving changes in bird populations including changes in land use and climate. Matthew Shumar is a wildlife biologist specializing in ornithology and landscape ecology, with specific interests in assessing anthropogenic effects on Neotropical migrants. He is also interested in engaging the public into citizen science efforts and exploring new opportunities for collaborative efforts between academia, agency professionals, and amateur ecologists. In addition to his role as Program Coordinator for the Ohio Bird Conservation Initiative, he is in charge of web communications for the Association of Field Ornithologists and is the co-editor of the recently published Second Atlas of Breeding Birds in Ohio.