This is NOT a question. I just thought you might know someone interested in this. Yesterday 05/04/2016 and this morning 05/05/2016, by using the National Audubon Society Field Guide to North American Birds, Eastern Region, (Knopf : 1997) I believe I have identified a male Rose-breasted Gossbeak in my backyard and also feeding in my neighbor's yard as well. I live in Catonsville Maryland near the corner of Bloomsbury & S. Rolling, very close to the Catonsville High School and the Community College of Baltimore County - Catonsville
Baltimore County Maryland
Thanks for letting us know. One of us (western Howard Co) saw one this week too- very interesting. If you are on Facebook, you may enjoy the MD-Birding page- we've seen reports there as well.