At 4:30, there was a singing male Hooded Warbler in Roberts Sanctuary, just
east of the (broken-down) boardwalk off the main trail. There was also a
smattering of more expected warblers.
I have seen very few species of migrants so far in Minneapolis this May
(and, more significantly, Connie Brunell has said the same). But a birder
there said she had seen a lot of birds earlier today, including a
Golden-winged Warbler and a Wood Thrush. This afternoon included
Orange-crowned and Black-and-White and male Yellow-rumped, so hopefully it's
still early.