Late 2014 was not the most bustling of Los Angeles winters, but at such a quiet time of year you can't really have expectations. The biggest "event" was the horde of varied thrushes that have scattered all over southern California. Usually a bird that makes a single appearance each year, the reported total has exceeded 500 in December 2014 alone.
Apart from being scarce, they are also quite nice to look at. Unfortunately I haven't seen one yet. So instead I will link you to a google image search. They are certainly quite impressive, but the local birdwatchers here are apparently sick of seeing them.