During the Central Park Squirrel Census, volunteers and Squirrel Census team members gathered data, truths, observations, weirdly poetic notes, and much more while covering over 3,000 squirrel sightings. The team then heroically pared it all down into 37 pages of the most essential info on Central Park's denizen grays — our Squirrel Supplemental. This little booklet includes, among other things, considerations of squirrel coloration, squirrel interactions with humans in the park, the relationship between Central Park squirrels and nemeses-dogs, a detailed explanation of our squirrel-counting formula, proper squirrel-naming conventions, and seemingly abstract but highly accurate representations of squirrel densities (each density given a name that can be used for, say, a squirrel softball team in the Central Park Squirrel Softball League (CPSSL)). Additionally, we once and for all time provide the final answer to anyone — anyone! — who asks the question, "Why?" You own nothing like this. The Supplemental goes well with the Central Park Squirrel Census maps, or maybe the 45-RPM; that's why it's called a Supplemental!