This last week we have loved seeing the Rose-breasted Grosbeaks bringing their young to our feeders. Each parent brings two. From the pink under wing coverts you can see these two are young males. The babies are constantly begging with a very quiet pee-you call that sounds a lot like a bluebird. Sibley has a recording on his app.
We have also had pewees and yellow-throated vireos singing recently.
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Janet Hinshaw, Librarian Wilson Ornithological Society University of Michigan Museum of Zoology Research Museums Center 3600 Varsity Drive Ann Arbor, MI 48108-2228 USA