These are not countable, because they were only picked up by the mic, but the first 3 represent my first ever American Tree Sparrows for nocturnal flight call pick-ups, and the fourth a reasonably early Savannah! Savannah would in fact be a life yardbird were I to have heard that note by ear. Times times of night each was recorded are: 2:27:31 am, 3:16:00am, 5:45:55AM, and 5:45:53am, respectively. Let the migration begin.
Also, just found this SOSP/FOSP (presumably the former, but hard to tell) from this morning at daybreak (6:50:22AM), so the sun was already partially up. I'll bet it was still moving though as I didn't see it in my yard at all today.
2013 and beyond
It's pretty simple: the most birds seen or heard from one's yard during 2013 will be the "winner". Want in? O.k....then do it despite that.
2013 promises to be a lot less mean but still a carbon-free birding competition, even if slightly less exciting than a MEGA x EPIC hybrid.