Photo 4201079, (c) Cullen Hanks, some rights reserved (CC BY-NC), uploaded by Cullen Hanks

Attribution © Cullen Hanks some rights reserved Uploaded by cullen Source iNaturalist Associated observations Photos / Sounds 5 photos What Common Periwinkle (Littorina littorea) Observer cullen Date July 6, 2016 09:00 PM EDT Place Greening Is, Southwest Harbor, ME, US (Google, OSM) Date Added July 6, 2016 08:05 PM EDT 3 IDs Research Grade View Sizes small medium large original