This has been the best spring for several years in my neck of the woods (Dixie/Williams Parkway in Brampton). My little ravine has been alive with birds for the last two weeks, with many new (for here) sightings.
Seen so far includes:
Black-throated green warbler
Blackburnian
Yellow rumped
Amercan retstarts
Yellow
Black and White
Chestnut sided
Ovenbird
Black throated blue
Palm
Pine
Magnolia
Nashville
Also had a pair of Scarlet Tanagers for a day or two, Baltimore Orioles.
Four catbirds are burbling and squeaking away, and there are a number of other songs that I can't place.
Long may they all stay but I think they will be gone when the wind goes round...