Okay so I know there's always a lot of "Mungojerrie's a male calico and that's like insanely rare omg he's so special!" in the cats fandom. But that feels so weird to me because... well let me break it down. I have two arguments:
Firstly, I want to acknowledge a theory, one that the whole "calico Mungo=calico male=super rare omg!" thing quite unfairly ignores, a very very good theory I've seen floating around occasionally, that Mungo is trans. This is an excellent theory and I love it, though I personally don't hc Mungo this way (I have my theories on who in the tribe is trans, just Mungo's not currently one of them). It would definitely explain why a male presenting Cat would have a normally female-exclusive color pattern
BUT
and here's my second argument, what if calicos are NOT exclusively born female in the universe Cats takes place in?
Calico is defined as a pattern consisting of at least 25%-75% white, with at least two other colors. The two other colors are typically orange/red and black, but can be brown, grey, tan, cream, gold, lilac, blue-grey, etc. (To my understanding this doesn't include darker shades of the same color as often seen in tabbies, for example an orange base with darker orange stripes in a ginger tabby)
Now let's have a look at how many male Cats fit this description:
Mungojerrie
Of course, the obvious one, with the most easily recognizable calico pattern in a fairly even distribution of orange, white, and black
Plato/Admetus (name depending on production)
Carrot top boi with black and red blotches on a white base, pictured here with actual calico for comparison
Pouncival/Carbucketty
White base, with black, brown, and sometimes rust stripes and patches
Tumblebrutus/Bill Bailey
Same story as Pounce, pictured here again with actual calico
Macavity
This one depends on the particular production's costume, but in quite a few, including the 1998 video, he's got enough white to quality as well as black and gold stripes and sometimes patches on a mostly red base
Coricopat
Again, not all his costumes include enough white to qualify, but the majority of the ones I've seen feature plenty of white plus lots of black/dark brown and a decent amount of orange/gold stripes/splotches
Honorary Mentions: Some interpretations of Skimble have enough white and black to technically qualify, but I'm not including him here because it's not nearly so common as the others. Usually Skimble's white marks are less than 25%. There's also some argument for Admetus/George depending on production, but his greys browns and blacks are too similar for me, I think he's just a tabby, plus he doesn't always have enough white
Mungo's starting to look a little less special isn't he? (No offense Mungo, you're very special for other reasons)
Could all if these boys be trans? Absolutely! It's 100% possible these are all trans characters. Not my personal hc (again, I have my theories, and none of these are among them… currently…), but it's an entirely valid hc.
Could all these be interpreted as something else? Well, I guess potentially Mac could be seen as a red tabby and the black marks could represent dark red, and his different costume interpretations certainly complicate things. Pounce and Brutus could also be potentially interpreted as bicolor brown tabbies, but it's a lot harder to make that argument with them, especially with the flecks of gold or rust that are often included in their costumes, and that much of their color is in patches rather than stripes. Cori, ehhh I mean I guess you could argue he's supposed to be a hypermelanistic orange tabby, idk I feel like that's reaching at this point, but I guess that's a valid interpretation.
There's no alternate interpretation.
Plato is a calico. End of story.
So in conclusion, I think calico males are actually a lot less rare in the Cats universe than they are in reality thank you for coming to my TED talk.
Bonus: three calicos and brown tabby being a fan club
Extra Bonus: Three calicos dancing in the dressing room