Trilobites: A Rare Bird Indeed: A Cardinal That’s Half Male, Half Female
A bird hopping outside the window lately is the strangest that Shirley and Jeffrey Caldwell have ever seen. Its left side is the taupe shade of female cardinals; its right, the signature scarlet of males. Researchers believe that the cardinal frequenting the Caldwells’ bird feeder in Erie, Pa., is a rare bilateral gynandromorph, half male…