As the name would suggest, long-term datasets take a long time to develop. Not only does it take a continuous supply of resources to support the work, someone has to physically go out every year and collect the data. To visualize the time investment and sheer number of people required to collect 50 years of seabird and marine mammal data, I designed this circular bar plot, illustrating the extreme commitment by some and small contributions by many over the years. It depicts the total number of days spent on Southeast Farallon Island (SEFI) by current and former staff and interns of PRBO (now Point Blue Conservation Science). Each concentric circle radiating from the map of SEFI in the center represents an additional 500 days of service, with Pete Warzybok in the lead at over 2,000 days! To keep the plot from getting too cramped, I narrowed the number of names displayed to just partial or full PRBO associates with more than two months spent on island, so this plot excludes many more island residents affiliated with various agencies, contracts, and universities, as well as people with brief stints – sorry if that applies to you. The graphic was created entirely with the ggplot2 package in R, aside from the border and line below the title that were added later in Photoshop. A high resolution 16 x 20 .png file of the graphic can be downloaded here: DOWNLOAD FILE