"Don't Hold That Thought"
"A file cabinet at the Patuxent Wildlife Research Center in Maryland holds some of the center’s six million bird-migration observation cards dating back to the late 1800s. The hand-written cards contain data about sightings of birds such as the ruby-throated hummingbird, often spotted in the 1930s when fruit trees bloomed in spring. Now being digitized, data from these cards will be stored on a U.S. Geological Survey database."
Source: Wildlife Professional, 09/18/2009