Sorry for the terrible photo, the scene was in the way. To fill in some info, the top of the head was red and on its upper chest or neck was a oval-shaped pattern with more patterning inside the oval. The back had a white part covered up by its wings. There was another one nearby as well.
New to me in Halifax NS. If correctly ID, said to be rare in Nova Scotia. Sighted previously in SW NS. Corrects/comments?
On the swamp milkweed in my garden