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Photo#356389
Uroleucon sonchi

Uroleucon sonchi
McNary Dam, Umatilla County, Washington, USA
Uroleucon sonchi is a widespread and common aphid feeding on sow thistle, or Sonchus.

Is it this McNary Dam
McNary Dam is a 1.4-mile (2.2-km) long concrete gravity run-of-the-river dam which spans the Columbia River. It joins Umatilla County, Oregon with Benton County, Washington. Any idea which side of the river?

 
Washington
Looks like Andrew has updated his flickr page since I uploaded this.

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