I have heard and seen a very late white-throated sparrow in my yard this year, up to June 11 (today). Maybe I have one that doesn't know much about migrating becuase I had one through the winter as well. Also new to the yard this year as far as staying through migration is a house wren. I don't think I ever appreciated just how noisy these darn things are. Lots of 5am wake-ups lately.