Photo by Brian Peer via Why Evolution is True blog.
Source: The “Why Evolution is True” blog.

This picture isn’t photoshopped. this is a rare bilateral gynandromorph cardinal, which is a type of animal that has both male and female characteristics, with the differently colored sides representing the separate sexes.

 

This particular image was taken by Larry Ammann of a bird feeding in his back-yard. Generally the female portion of the birds are grey, with bits of light-brown and red, but this little birdie was male-colored on the left and female-colored on the right.

 

According to Ammann, “a genetic mistake occurred during the first cell division of the fertilized ovum, causing one of the cells produced by this division to be male and the other to be female. As this egg developed, the entire right side remained female and the left side remained male,”