It just occurred to me that, for the majority of alien species in the Mass Effect series, I haven't noticed any female representation.
Species I've seen females of:
- Human
- Quarian
- Rachni
And... wow, that's it. Now there are actually several species we can logically exclude from a list of those where we'd expect to see females in-game.
- Asari
- Mono-genderd. Though they appear female, and refer to themselves with female pronouns, I'm not quite sure whether they technically are.
- Geth
- Artificial life-form. If they reproduce at all, I doubt they do so sexually.
- Krogan
- Protected class. Females are so critical to the Krogans' survival as a species, that they're kept separate from the rest of Krogan society. I wouldn't expect to see them unless we had a mission that actually involved them as a group.
This still leaves several rather major species where I can't think of a real explanation for me not having noticed any females yet.
- Turians
- Elcor
- Volus
- Salarians
- Drell
- Hanar
- Though I doubt we'd be able to tell a difference, there could be Hanar who exhibit more feminine qualities than the ones I've interacted with so for. That is, if they reproduce sexually at all.
So, am I missing something? Are there any female NPCs which are representatives of the species in that last list - interactive or not? Or, are they just as conspicuously absent from the game as I think they are?
Thanks to everyone for letting me know that I can expect to see some other female aliens throughout Mass Effect 3. One more I ran into, that I haven't seen in other answers, is Dalatrass Linron (female Salarian) who is first encountered at the war summit.
Also, as mentioned in a comment but not in any answers, there is a female Krogan who is key to the primary mission in Mass Effect 3. This ended up falling sort-of in line with my expectations regarding any possible appearance of a female Krogan - it specifically involves a sub-plot that affects the future of Krogan females as a whole.
A note about both: I'm not sure if it's because of the overall body shape of the species, or their ceremonial dress, but it's really hard to tell that either of these are female until you actually speak with them.