I used to enjoy the divorced birds sub over in the other place that this tweet spawned
this post was submitted on 10 Jun 2025
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The bird on the left is an "independent plumage" ruff. This species is particularly weird because they appear to have 5 genetic genders. The short version is: there are male and female ruffs. The ruff, Philomachus pugnax, has 3 different males: "Independents" "Satellites" "Faeders" Independents fight for territory on leks (mating grounds) which females typically like. Satellites "orbit" the lek without fighting and get occasionally allowed to mate with females by the independents. This is allowed because leks are only successful if there are multiple males for the females to choose from. Faeders "cross-dress" by having typically female plumage. Faeders then wait for an actual female to signal they are ready to mate and then a faeders swoops in and does the deed.
To make things even more interesting, these traits are caused by chromosomal inversions (part of a chromosome got "flipped" during meiosis (sex-cell replication)). If a faeder or satellite happens to mate with a female who is a carrier for the inverted chromosome. Their male offspring has a 50% chance of inheriting both of the inverted chromosomes from both parents which will cause death! ☠️
You can read more here: https://www.allaboutbirds.org/news/among-ruffs-some-fight-loving-fighters-dont-like-to-fight/ And here: https://learnthebirds.com/the-ruff-our-non-binary-migrant/
my wife hates birds and would absolutely hate this.
emailing the link to her now.
Oh this is rad, thank you!
They're kinda giving me more of a twice widowed vibe. Those birds have been to some funerals.
Nah, the one on the right is definitely recreating this photo Musk took of himself on purpose:
No one is going to convince me that the left one isn't a character from the hunger games movie!!
Stolas looking good.
HA, needed that laugh. Thanks.
lol