English: Map of the Hawaiian archipelago showing the migration/colonization routes of Theridion grallator over time. Samples were taken from seven volcano regions (in red). T. grallator is not present on Kauai or Niihau so colonization may have occurred from there, or the nearest continent. Purple lines indicate colonization occurring in conjunction with island age. Light purple indicates backwards colonization. Based on allozyme and mtDNA data. Adapted from Croucher et al. (2012).^[1]