I noticed the birds sining more today too. A male Northern Cardinal was doing it territory call, which means spring is another day closer! Sounds like you had another lovely morning commute.

It's cool seeing a cardinal when I go back east. Having lived my whole life in the high Nevada desert, they seem so exotic! One "bird" that I heard this morning turned out to be nothing more than a squeaky fan belt in someone's car. Actually pretty similar to the real birds I heard!