I just received the coolest bird photo I've seen in a long time. A retired colleague of mine (Tom Goodwin) got this from a friend of his who teaches in Rock Island, Illinois. This is a gynandromorph cardinal, half male and half female that is frequenting the feeders by his house. This is a genetic abnormality that happens when the sex chromosomes (Z and W in birds) do not separate normally during early embryonic development. Credit for this find goes to Bob Motz and the photos were taken by Jim Frink.
The above photo is the best one. The photos below are small but do allow you to view the bird from different angles.
It just goes to show that even the "common" birds can show you amazing things. A pretty exciting find for mid-winter.