Actually, there have also been small numbers of northbound TREE Swallows as well in warm weather during December and the beginning of January the past couple or so years--bee-lining it up the immediate coast on a number of occasions, in at least San Diego and Santa Barbara counties (mostly in the former). Just small groups of birds (2-6) shooting "north" in direct flight up the coast, and not apparently lingering. I've seen Trees doing it as much as Barns at this time of year here in San Diego County, but in most counties farther north it appears to be predominantly Barns, as Alvaro discusses. --Paul Lehman
v1.30 - 01/05/16 - Revamped cloud logic, optimized database queries, linked to eBird rarities. v1.23 - 12/08/11 - Added direct link to CBRC records. v1.22 - 12/03/11 - Corrected GMT offsets on dates. Added last 5 posts at top. v1.21 - 11/24/11 - Added direct link to range map for NA birds. v1.2 - 11/23/11 - Greatly improved graphing technology - separates month vs. year by posts. Added species auto-complete functionality. v1.14 - 11/22/11 - Added cloud bubble for common thread topics. v1.13 - 11/22/11 - Added integrated photos where available. v1.12 - 11/22/11 - Added multiple input boxes for additional refinement, negative search criteria (eg. -keyword). v1.11 - 11/22/11 - Added banding code, species look-up. Also direct link to recent eBird observations. v1.1 - 11/22/11 - Added 'date' functionality. Shows top 'month/year' combinations for a query. Restrict results to that 'month/year'. v1.0 - 11/21/11 - Initial version coded. Currently archiving 'lacobirds' and 'calbirds'.