Pavement ants in Lake Chelan, WA

These pavement ants were seen in Lake Chelan, WA.  Their formal name is Tetramorium caespitum.  They are a member of the Arthropoda phylum.  Their name refers to being found typical in the pavement of sidewalks, patios and driveways.  You can find more information at https://en.wikipedia.org/wiki/Pavement_ant.