Reason: Androgyny isn't strictly ambiguous gender, but also (and, at least from my knowledge, used more often to describe) a melding of male and female physical traits that have nothing to do with genitalia; tomboyish women, feminine (girly) men, for two examples. I bring this up because I was looking at https://e621.net/post/show/393038 and, while the kobolds depicted are neuter (and I have tagged it as such) some exhibit a slightly more feminine form, others a slightly more masculine form, of which I would call them androgynous- of mixed male and female characteristics.

For images like https://e621.net/post/show/394484 ambiguous_gender still is appropriate, since it is more specifically hiding what traits could identify it as male or female or neuter. https://e621.net/post/show/393658 the same, since we cannot tell the gender of the character in the shadows in the background.

Comparatively, https://e621.net/post/show/393510 we can see no breasts, but we can also clearly see no balls or shaft; typical mammalian-breast-less avian female, but looks a bit masculine. Neuter doesn't apply, but androgynous would.

https://e621.net/post/show/393510 showcases a feline whose genitalia are hidden, a rather masculine face, with rather feminine hips (likely because of the feline aspect). This character is androgynous, AND ambiguously gendered.

https://e621.net/post/show/391440 here we see two males (their penii are very flagrantly in view), with the one being pinned to the lockers showing a very feminine set of facial features, and even cross-dressing.

Girly should imply Androgynous. Androgyny should be aliased to Androgynous. Tomboy should be implying Androgynous as well. Ambiguous_Gender should be separate, and should be used in those cases where gender cannot be told, Androgynous should be used for instances of mixed male/female physical traits, and can thus appear on images together or separately.

Androgynous can also mean a lack of gender identifying characteristics.
It is in fact any situation where you cannot determine gender, either due to lack of identifying features, or both male and female features to a point where a determination cannot be made.

In other words, ambiguous in gender.
Ambiguous is the same thing, but not specific to gender, so adding gender to ambiguous = androgyny.
They're literal synonyms.

For the purpose of lacking gender identifying characteristics, as I noted, ambiguous_gender should remain and continue to be used for that aspect. However, androgyny is far more than -just- ambiguous gender, as noted and can be seen around the world in many shapes and forms, in many gradients from completely unknowable to more feminine or masculine. Girly is the specific male-with-feminine-aspects variation of androgyny, as is tomboy for the female-with-masculine-aspects variation. The thing is, even neuter characters can have masculine or feminine traits that would properly label them as androgynous, even when we can clearly denote that they are neuter (or in other cases male or female, also as noted) via lack of genitalia, the physical body shape of the character(s) cannot be tagged properly because they cannot be considered girly (which are definitively male; there was a big hullabaloo about the usage of girly as a male-only tag and it was quite firmly driven home that it was, indeed, for males only, NEVER for females, even when they were being girly.) or tomboyish (which are female) even though their body shape has characteristics of either or both.

It sounds like the only thing the tag wouldn't cover is manly men and feminine women.

DrHorse said:
It sounds like the only thing the tag wouldn't cover is manly men and feminine women.

No, only those who have a sufficient quantity of masculine and feminine features combined that are not primary or secondary sexual characteristics (breasts, vagina, balls, penis, adam's apple, beard) that leave a character looking boyishly feminine or femininely male. Examples of people (real life) like this would be Prince, Ellen DeGeneres, B. Scott, David Bowie (Or as I remember him, Jareth, King of the Goblins), Bret Michaels, Kate Moennig, Adam Lambert, Grace Jones, Tilda Swinton (aka the-archangel-I-was-never-sure-if-they-were-male-or-female-until-I-Googled-her, from Constantine), Freja Beha, Agyness Deyn, and many, many, many more. These are all people that are obviously male or female, but are also very feminine (for men) in a "youthful girl" sense or a "mature woman" sense; or masculine (for women) in either a "manly man" sense or a "boyish looks" sense. You couldn't really label any of them (well, except maybe Tilda Swinton >_>;) as ambiguous gender, but they have very definite female or male characteristics that are defined as androgynous.

Be it as an over-tag (meta-tag?) for girly and tomboy, as well as for those cases where a neuter also displays visual characteristics of androgyny (as the kobolds in that image initially brought me to make this post), or as a replacement tag for them (which I would not suggest; too broad a catagory then) or what-have-you; All I ask is that we de-alias it, whatever else we do. Androgynes are not always ambiguous_gender.

Edit: Another image to the list of examples. https://e621.net/post/show/361214 this male is androgynous, and quite possibly ambiguous gender- though we can see chest, he is effeminate, while cross-dressing, and his junk is covered. Could be flat-chested (though suggested musculature shows masculine) or cuntboy.