Stopped by Burris Basin, in Anaheim, for an hour or so this afternoon (17 March), taking looks from the south (Ball Road) and west (Wagner and Rio Vista) sides. A decent number of birds, but could not locate the Red-necked Grebe or the Palm Warbler that had been present, which appear to be gone (though said that once before for the grebe, and then it made one more appearance--on 3 March).
There were good numbers of swallows, but mostly just the local breeding species (especially Barn and Tree). Minor "highlights" included a Hooded Oriole (in the Tree Tobacco at the sound end), and seven Whimbrels flying over, calling, going north (not encountered very often at Burris). Of course, March and April is the one time of year that it's not too unsual to see Whimbrels inland (foraging in fields or more likely flying over, sometimes in good-sized flocks); during spring, substantial numbers of Whimbrels migrate north through many of the interior valleys of So Cal.
There were no signs, yet, of any of the colonial breeders at Burris (i.e., the Forster's Terns, etc.), although it's too early for most of these to begin showing.