The Bobolink
The bobolink is the only american bird with a white back and a black underbelly. In the past, this bird was sometimes referred to as “rice bird” due to its penchant for eating grains. It can be found throughout North America and Canada.
The first time I saw a bobolink, I thought it was flying upside-down! It is far more common for the underbelly of a bird to be lighter than its back.