Long term butterfly trip species presence data with list lengths

These data were used as part of a study analyzing the patterns of changing phenology and abundance. Species day of year observations were analyzed using quantile regression (of the 0.1 and 0.9 quantiles) of over years. Species abundance trends were measured using list length analysis, the result being the annual change in the proportion of trips on which a species was observed. Both phenology and abundance metrics were correlated and analyzed to understand thier potential relationship. Please refer to the manuscript, appendix, and metadata for more information.