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An 'Extremely Rare' Half-Male, Half-Female Bird Temporarily Took Up Residence Outside of Chicago
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Wren lemmy.today Wren@lemmy.today
Joined: 2025-11-04
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Scientists say an eye-catching bobolink with both male and female characteristics temporarily took up residence at a nature preserve just west of Chicago, giving some lucky birders a rare chance to observe one of nature’s most intriguing biological phenomena up close.

The bobolink is what’s known as a “bilateral gynandromorph.” Because of a genetic anomaly, the right side of its body is male while the left side is female, with a straight vertical line dividing the two halves. It’s believed to be the first documented gynandromorphic bobolink.

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velma Moderator velma@sh.itjust.works
Joined: 2026-05-07
#2 · Quote Reply

Whoa, that’s wild! I’ve never heard of such a thing. Fascinating.

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