Distribution of bumble bee surveys in the contiguous United States and Alaska. Size of symbol represents the abundance of bumble bees detected. US states not included in the dataset are cross-hatched. 

 
  Part of: Koch J, Lozier J, Strange J, Ikerd H, Griswold T, Cordes N, Solter L, Stewart I, Cameron S (2015) USBombus, a database of contemporary survey data for North American Bumble Bees (Hymenoptera, Apidae, Bombus) distributed in the United States. Biodiversity Data Journal 3: e6833. https://doi.org/10.3897/BDJ.3.e6833