Among our most familiar birds red wings seem to sing their nasal songs in every marsh and wet field from coast to coast. The red shoulder patches of the male hidden under body feathers much of the time are brilliantly displayed when he is singing.
When identifying a bird in flight observing the structure of its wings is the place to start.
Beautiful bird wings. They are notably bold and several will often attack a larger bird such as a hawk or crow that flies over their nesting area. After noting each of these structural elements you may have all the clues necessary to make an identification based on information in a good bird field guide.