National Park Service scientists and collaborators from a wide range of cooperating organizations have released a report documenting the status of dozens of key indicators of the ecological health of Yellowstone National Park, quantifying a mixed bag of success stories and cautionary tales about natural resources in the park. The 2011 Natural Resource Vital Signs report is meant to help park managers understand the interconnected factors affecting the overall environmental picture in Yellowstone. It presents scientific data on everything from fires and earthquakes to bald eagles and boreal toads.