The spigot is on; Yesterday (March 18th) brought Song Sparrows (#47) back to the bushes of Delta Co. Also conspicuous were an influx of blackbirds and robins.
For me the day started with a Great Horned Owl (#46) heard through the window before dawn and ended with Hooded Merganser (#48) and a pair of Trumpeter Swans (#49) that were attacked by a Mute Swan. I had just noticed this distant pair of swans with black bills engaged in courtship (mingling their stretched necks and gently nuzzling' their bills) when a swan of the same size chased them off. Trumpeter's by size and bill color unless there are objections.
As I write this morning the first robin song of the season.