Again, note the black back feathers with gray-brown fringing that give the bird an overall 'gray-black' appearance. This individual is a juvenile based on the white fringing on the back feathers. The short, stubby bill is also diagnostic. On shore things are more difficult because Semipalms can look alot like Baird's Sandpipers. Note, however, the thin necklace on the individual in the second image, below. Too thin to be a Bairds. The third image shows an individual with a thicker necklace, but its a darker brown and smudgy, like the individual in the fourth image, below. Bills on these individuals are short and stubby while the Baird's would show a longer, straighter bill.
Solitary Sandpiper. However, the spots are more triangular, whereas a Solitary would show circular spots and greener legs. This individual also lacks a 'distinct' eye-ring.
Only 1 American Avocet was seen this evening, but it was far out on the edge of the mudflat and only record images were digiscoped. A report of a Buff-breasted Sandpiper could not be confirmed this evening.