What 7 inch bird is yellow with black striped wings with dots of red on shoulders and under tail feathers?

The bird you are describing is likely the Common Yellowthroat (Geothlypis trichas). This small, vibrant bird typically has a yellow body, with distinctive black stripes on its wings and red spots on its shoulders and under tail feathers. It is commonly found in marshy areas and dense vegetation throughout North America. Its cheerful song and striking appearance make it a favorite among bird watchers.