Ok. Quick question.

Do we know what the Ayleids (Ayleidoon to be exact) looked like? Height, build, common hair colors, all that good stuff.

I've been scrambling all around the imperial library trying to find books about it but with no success. The only bit of info on their appearance I could find is that they are not as dark as Dunmer, but not as pale as Altmer.

http://www.uesp.net/wiki/Oblivion:Ayleid_Guardian

Pretty much like Altmer in shape and features. No surprise there, being called Heartland High Elves.

Mankar Cameron was Ayleid, just so ya know.

Mankar Camoran was not an Ayleid -- just a half-Altmer half-Bosmer bastard of the Camoran Usurper. http://imperial-library.info/content/oblivion-refugees

http://imperial-library.info/content/morrowind-2920-last-year-first-era

They had feathers

Haymon was a distant and bastard son of the Cameron throne (hence the surname), who were established by Ayleid refugees fleeing Pelinal's genocidal wrath.

I knew that around the time the Camoran Dynasty was established, Valenwood was welcoming refugees (human at first, then Ayleid). But I was under the impression the Ayleids started coming shortly after the dynasty was established. I supposed some intermingling could have occured between races...but still. It seems unlikely that any Camoran would be a full-blooded Ayleid.

Still, if you've got a source that says I'm wrong, I'd love to see it -- I think it'd cast an interesting light on Mankar's dialogue in the game.

Hmmm, it may indeed be fanterpretation. Eplear founded the dynasty about 350 years before the Allessian revolt, but then we have a huge gap in time until the Cameron Usurper. I do distinctly remember having the impression that there was a lot of Ayleid blood in the line though. So it might be a dev quote (which I'm not going to find) or it might be fanterpretation for why there was so much Ayleidic architecture in Paradise (and why Mankar looked Altmeri, having 'purified' the Bosmer out of him).

Aylieds/Heartland High Elves/Bird people are just that; Similar to to Altmer (or rather Aldmer, perhaps Ayleids are just as/more close genetically to Aldmer that Ayleids.)
However, they also are described as bird people, and it is likely that Topal's bird-men on the City Isles (at that point they were still plural) were Ayleids. I have taken it to mean that, since they are such famed masters of http://www.uesp.net/wiki/Lore:Daughter_of_the_Niben that they perhaps levitated everywhere. Also, their appearance is subject to change; they are also famed shape-shifters.

No, those are the nedics.

The men were the "beast people" of the Heartlands.. the reason Ayleids wore feathers is similar to why Nords wear bear pelts.

I'm now imagining Nordic berserkers (bear-serker) going up against Ayleidic Bird-Warriors. The results are comical.