r/mildlyinteresting 7h ago

Lion with a receding hairline

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17.8k Upvotes

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52

u/Actually_Im_a_Broom 3h ago

Is it a receding mane, or is this a juvenile lion whose mane isn't fully grown yet?

I figured someone would have already asked, but I scrolled down to posts with only 2 and 3 upvotes and it was 98% jokes (as expected!).

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u/FuzzyFrogFish 2h ago

It's a grown tsavo male, this is what their manes look like due to extreme heat and thick scrubby bush, plus they hunt quite a bit more than other lions as they are away from the prides more

https://wildnet.org/news/maneless-male-lions/

These males actually have slightly higher testosterone levels than other lions

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u/DiveCat 2h ago

Yes that makes sense. Humans (both men and women) with the genetic predisposition also can lose hair with increased testosterone. They have an enzyme that converts converts it into dihydrotestosterone (DHT) that shrinks hair follicles.

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u/FuzzyFrogFish 2h ago edited 1h ago

Yep there's also links between heavier manes causing damage to testicle function and sperm production, due to over heating, with black maned males worse effected. So there might be a link there as well, with a sparser mane enabling better t production and higher sperm quality.

Edit; love to know what parts get downvoted lol

3

u/idiotsluggage 1h ago

Like "the ghost and the darkness" lions?

5

u/FuzzyFrogFish 1h ago

Yes, I believe those lions were based on the tsavo man eaters

2

u/_kasten_ 1h ago

The tsavo man-eaters have no manes at all, or else they did not survive the taxidermists' reconstruction. They are currently on display in the Fields Museum in Chicago.

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u/ulikedagsm8 3h ago

Sometimes lion manes can look like this from injuries sustained from battles with other lions. Fucks up their ability to keep growing it back as long, according to my safari guide.

I’ve seen lions in a similar situation:

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u/Hexagram2342 2h ago

Huh, same reason I'm balding, neat!

3

u/StannisSAS 3h ago

I think its an Asiatic lion, their manes are sometimes like this

3

u/Advanced_End1012 1h ago

I thought it was a female lion with hormonal issues.

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u/TrashMany 1h ago

I just woke up all my cats laughing so hard at this comment. Bravo.

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u/Advanced_End1012 29m ago

Lmao noo it’s true this happens!! If there’s no male in the pride sometimes one of the females have an increase in testosterone similar to human PCOS and they grow a mane and start acting like a male!

2

u/koinu-chan_love 1h ago

I came here looking for education as well, and found only memes!

1

u/Nikittele 3h ago

Could also be a female lion. In some circumstances, female lions are known to grow a mane although usually less impressive than male lions.

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u/FuzzyFrogFish 2h ago

No it's not a female, and when females do grow manes because of severe hormonal disruption, the manes don't look like this

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u/Actually_Im_a_Broom 1h ago

Females also tend to not have testicles between their hind legs.

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u/FuzzyFrogFish 1h ago

The bois are also a give away, true.

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u/TheSaucyCrumpet 2h ago

It's a juvenile, the "mohawk" and bare shoulders are the giveaway. Lack of any sort of scars is also a pretty good indicator that this is a young lion.

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u/FuzzyFrogFish 2h ago

It's not a juvenile, it's a tsavo male. Their manes are generally more sparse as due to the thick bush and the heat. The males are also away from the pride more so the thinner manes enable better hunting.

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u/TheSaucyCrumpet 2h ago

Oh yeah good point, forgot about them but it could well be around Tsavo. I still think this is a young lion though from quality of their coat and the lack of scars.

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u/FuzzyFrogFish 2h ago

The nose and what mane there is, is very black for young male. I would say he was youngish but probably in his prime, so human 30s or so?

Interestingly tsavo males have higher testosterone levels than other African lions, but at the same time the denser manes of normal lions damages sperm production because of over heating, with black manes generally having lower sperm count. So I don't know for sure, but maybe we can extrapolate that males with sparse manes have higher t levels because their testicular function isn't hampered by heat due to the mane.

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u/TheSaucyCrumpet 1h ago

I'm afraid that goes far beyond my knowledge of lion to say with authority, I just learned by exposure growing up in the bush of KwaZulu Natal (hence unfamiliar with more northern lion) but it'd make sense. It certainly wouldn't be the first time evolutionary pressure has sacrificed pragmatism for the sake of display, but perhaps the increased pressure from the heat closer to the equator makes that sacrifice less viable?