Sap

Tree bleeding

Possibly the culprit, a Red-Breasted Sapsucker

Got a worm!

Brown pelicans

Beginning work on a nest?

Bonus squirrel

Cackling Goose

Branta hudsonia minima, the tinier cousin of the Canada goose:

Mirror test fail

Magpies are the only birds that recognize themselves in mirrors. As evident from the fact that these gulls were squawking at and trying to attack their reflections, they don't pass the test. 

Mudflat birds

Molting hawk

A lot of Sanderlings

Pied-Billed Grebe

Cinnamon Teal

Western Grebe

Bufflehead

Killdeer

Courting?

Splish splash taking a bath

Rarely seen Tricolored Heron