As of the end of June, 2016, the Ernst Mayr Library has digitized and contributed over 9300 volumes (3,162,725 pages) to the Biodiversity Heritage Library (BHL). Contained within these pages are 11,966,599 instances of indexed species names. Since the first volumes were uploaded to BHL in December, 2007, Ernst Mayr Library items have been accessed a total of 7,040,287 times. Monthly usage now consistently exceeds 100,000 downloads with June, 2016 showing a total of 171,499. What titles are currently enjoying the highest usage? Click here to see a visualization of the 25 most frequently downloaded Mayr Library volumes in June, 2016.