Today, I began reviewing the packets from the Moss Landing CBC, and the description provided for the unidentified kingbird strongly suggests a Western Kingbird. There are a scattering of winter records (according to eBird) for Western Kingbirds in Santa Cruz County, so this is definitely a possibility. But, being such an exceptional find, this report will take a considerable amount of documentation. So again, if anyone is birding in the Pinto Lake area (perhaps to look for the Eurasian Wigeon at Pinto Lake County Park), the kingbird was seen in the neighborhood between Doering Lane and Littleway Lane off Green Valley Road before you get to the park. But the bird may be along any of those side roads off Green Valley Road; or, perhaps, may have even moved across Green Valley Road and gone into the county park.
Anyhow, if anyone is up for a birding treasure hunt, good luck and please let me know if you strike the jackpot!