A window fatality. We had one last year (Cardinal). The curtains were closed, they have alternating colors and patterns, so I'm not sure why this bird was unable to see that. Sun glinting off perhaps?
There were so many Warblers at East Harbor. They were everywhere. There were hundreds. Birding people go check this out and see if they are still here. Easy hike. Wheelchair accessible paved area too for my wheelchair bound friends🦋. I told (2) ladies with large cameras on the other side of Marblehead to go to this area to observe a lot of Warblers.