A cardinal that is half male, half female puzzles scientists, delights birdwatchers

These animals are male on one side and female on the other

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A cardinal that is half male, half female puzzles scientists, delights birdwatchers

Sorry about that! I didn't realize that I mistakenly put link in title line.
Super cool and interesting, who knew?!
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Shirley Caldwell took this photo of a rare gynandromorphic cardinal through her kitchen window.Shirley Caldwell

Peer and a colleague studied a bilateral gynandromorphic cardinal for more than 40 days a couple years ago.

“We wanted to know if the individual was going to behave as a male or female; we also wanted to know if they were capable of producing viable offspring,” Peer said.

Because gynandromorphs are so rare, studying them is hard. During the time Peer studied one, he never heard the bird sing or mate, but that doesn’t mean it never did either of those things.
 

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