- The Wikidata entry does not indicate this island is part of the Snohomish River. Look up other islands and determine how a river is specified in Wikidata, and then update the record to indicate the Snohomish River.
- Star polygon (Wikipedia)
In geometry, a star polygon is a type of non-convex polygon. Regular star polygons have been studied in depth; while star polygons in general appear not to have been formally defined, certain notable ones can arise through truncation operations on regular simple or star polygons.
