Okay, now I'm really being a wiseguy.
There are actually several species of Sandpiper, and they all look very similar. They're not easy to tell apart. Even experts have trouble and I'm not really an expert.
One variety is the Spotted Sandpiper. I'm pretty sure that's what we're seeing here, but there's also another species called the Solitary Sandpiper. These don't really spend all their time alone, they're just more solitary than other sandpipers. And while I am pretty sure that this is a Spotted Sandpiper (because, um, of the spots) he is alone.
Which makes him a solitary Sandpiper. Get it?
I apologize.