Photo 14226210, (c) Eric Running, some rights reserved (CC BY-NC), uploaded by Eric Running

Attribution © Eric Running some rights reserved Uploaded by ewrunn1ng Source iNaturalist Associated observations Photos / Sounds What Checkered Periwinkle (Littorina scutulata) Observer ewrunn1ng Date March 17, 2018 09:59 AM PDT Place Northwest Seattle, Seattle, WA, USA (Google, OSM) Date Added March 17, 2018 12:32 PM PDT Description On Rockweed (Fucus distichus). 2 IDs Research Grade View Sizes small medium large original