To categorize 11,657 citations from 192 papers invasion ecology and biological control, Ashley Schulz color-coded each citation, assigning them to the following categories: biological control (green), invasion ecology (orange), other control (blue), other ecology (yellow), and non-ecology (pink). She then counted the citations by category, tracking the numbers in a comprehensive spreadsheet, and ran statistical analyses on the raw data. (Image courtesy of Ashley Schulz, Ph.D.