Are these commonly seen in backyards?
Well it all depends on your yard, but it wouldn't be too unusual.
Some Brown Thrashers will be around all summer, but you are more likely to find them now, during migration.
As for the thrushes, they were more likely Hermit Thrushes. Both species come through in good numbers during migration, but the Hermit Thrushes are earlier. You generally won't start seeing Swainson's Thrushes until May. (Yes I realize that's tomorrow :wink: ) They look
very similar. The easiest ways to separate a Hermit Thrush from a Swainson's are that the Hermit's tail is a noticeably rustier colour than the back & wings. They also have a habit of pumping their tails (up fast, down slow).
BB