The state bird of Iowa is the American Goldfinch. It officially became the state bird in 1933. Yet it is not the most commonly seen bird in Iowa, and before you ask, no it's not hawks either.
It’s called a ‘bilateral gynandromorph.’ Half of its body is male and the other half is female. Its colors split right down the middle.
The photos (below) of the half-male, half-female Northern Cardinal were taken in Grand Valley, Pennsylvania...