These data accompany the paper: “Secondary nectar robbing by Lycaenidae and Riodinidae: opportunistic but not infrequent” E. E. Wilson Rankin1 and D.T. Rankin1 1Department of Entomology, University of California Riverside, 900 University Ave, Riverside CA 92521 The metadata tab describes all variables for each spreadsheet. visitor data: assesses frequency of nectar robbing by Lepidoptera to this patch of scarlet bugler Family: indicates the taxonomic family of the butterfy observed visitation: the number of visits to scarlet bugler Type: type of visitation (nectar robbing or legitimate) nectar robbing holes data (assesses the frequency of nectar robbing holes in all 7 plants in this patch of scarlet bugler) Plant.ID.num is the unique identifier for each individual plant Num.stalks describes how many stalks an individual plant had Num.nectar.rob.holes documents how many flowers (out of a subset of 10)* with nectar robbing holes Num.no.holes represents how many flowers (out of a subset of 10)* with no holes * 10 flowers were randomly selected from across the stalks for each plant.