Western Sandpiper

Another recent first for me was a western sandpiper at Salton Sea SRA on the northeastern shore of the Salton Sea. It is one of the most abundant shorebirds in North America.  

Adults have a short dark bill that thins at the tip. The body is brown on top and white underneath with reddish-brown on the crown. When breeding it gets a more scaly looking back, a whiter face, a rusty cap and rusty mottling on the back. 

These last two photos are out of focus, but give different looks. 

I originally thought it was a least sandpiper.