The American Crows in the neighborhood quickly became obvious at the beginning of my morning walk. Such loud birds! Other species added their voices to the brisk air: Black Phoebes, Bushtits, hummingbirds, Cassin's Kingbirds, Mourning Doves.
What stopped me in my tracks was a Northern Mockingbird perched on a telephone wire. It was silent -- not a peep. I peered at it from various angles and still didn't hear a sound from the NOMO... which surprised me.
That species seems to always loudly proclaim its presence, so this bird's silence kinda threw me. It also reminded me that birding continually reveals surprises.