A Cardinal That is Half Male, Half Feminine

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In Texas, Pennsylvania, and elsewhere, folks have reported seeing Northern Cardinals which are pink on one aspect and brown on the opposite, indicating {that a} hen is half male and half feminine. This anomaly happens in different species of birds, as properly, not simply cardinals. Bugs, too! Scientists name these bilateral gynandromorphs.

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A Cardinal That’s Half Male and Half Feminine

Written by Bob Sundstrom

That is BirdNote.

[Northern Cardinal song, https://macaulaylibrary.org/asset/49062 .05-.09 here and there]

In nature, issues aren’t at all times black or white, male or feminine. There have been sightings of cardinals which are pink on one aspect and brown on the opposite, indicating a hen that’s half male and half feminine. This anomaly happens in different species of birds, as properly, not simply cardinals.
 
Scientists name these birds bilateral gynandromorphs, (pron. ji-NAN-druh-morf), recognized informally as “halfsiders.”
 
Birds’ intercourse chromosomes are totally different from these of mammals. Male mammals have one in every of every intercourse chromosome, an X and a Y. Feminine mammals have two X chromosomes. However in birds, that is reversed. The feminine has two totally different intercourse chromosomes, whereas the male has two of the identical.
 
So, if a hen’s egg develops with two intact nuclei, this second nucleus may also be fertilized. It’s form of like while you get a hen egg with two yolks. However on this case, it’s just like the yolks have fused. And the results of these fused embryos is a chick that’s half male and half feminine — similar to that half-red and half-brown cardinal. So far as we all know, halfsiders don’t reproduce.
 
Try a photograph of a halfsider cardinal on our web site, BirdNote.org.

For BirdNote, I’m Mary McCann.
 
Right this moment’s present dropped at you by the Bobolink Basis.
 
[Northern Cardinal song, https://macaulaylibrary.org/asset/49062 .05-.09]

 
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Producer: John Kessler
Government Producer: Sallie Bodie
Editor: Ashley Ahearn
Affiliate Producer: Ellen Blackstone
Assistant Producer: Mark Bramhill
Bird sounds offered by The Macaulay Library of Pure Sounds on the Cornell Lab of Ornithology, Ithaca, New York. Recorded by
BirdNote’s theme was composed and performed by Nancy Rumbel and John Kessler.
© 2020 BirdNote   April 2020/2022         Narrator: Mary McCann

ID#  gynandromorph-01-2020-04-07   gynandromorph-01

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