By the time we got out there, the birds were mostly done with singing territorially and were more focused on feeding nestlings and fledglings. This Western Tanager was an exception, singing vigorously.
You don't see that many bluebirds in our pines either (though I think I remember a few Easterns in southern pine stands). Mountain Bluebird was common in the Black Hills; we saw multiple birds every day.
Summer Juncos are always a fun novelty to an easterner. The Black Hills pinelands have the White-winged subspecies.
The white wing bars were not very prominent; I've seen the occasional bird at Warren Dunes with at least as much white in the fall. The larger number of white outer tail feathers stood out though.
The juncos had a lot of fledglings about as well.
Audubon's warbler liked the treetops and didn't come down very often. Never having been in a place with breeding Myrtles I don't know if that's their preference as well during the summer.
More evidence we weren't in Michigan any more...