It seems from all your reports and our experience that yard birds have been very interesting this spring.
A Swainson's thrush showed up in the duff amidst our shrubs. We noticed it first on Tuesday and it was here all day yesterday.
It blended in so perfectly with last year's leaves; we only saw it when it tossed them around delicately (compared to the catbird).
Our yard has warbler species uncommon to us, like Canada, Blackburnian, Wilson's, besides Nashville, 4 Cape May warblers and 15+ hummingbirds at once across the street.
What's interesting besides the diversity is that they have all stayed around for 2 or more days.
I'm assuming weather is the main driver.
I'm grateful our mostly no-spray neighborhood with diverse plantings is offering food for their journey.