LDS Darth Revan wrote...
Quarians are generally shorter and of slighter build than humans. Quarians have an endoskeleton, lips, teeth, and two eyes with eyelids and tear ducts; they also have three thick fingers on both hands which include a thumb, an index finger, and a long fingers, similar to the middle fingers for humans, as well as three toes on each foot. Quarian facial structure and hair actually makes them the most similar to humans in physical appearance. They have pale skins with visible cybernetic augmentations on their bodies in the form of metal lines, and their eyes have white irides, no pupils and red sclera. Their lower legs are bowed backwards significantly, compared to asari or humans. Aside from hands and legs, their general body shape and sexual dimorphism is similar to humans. Their ears or ear analogues differ in a noticeable fashion from those of humans, with references made to "what [passes] for the quarian version of an ear".
This excerpt is from the Mass Effect Wiki, and from what I've seen Tali's photo fits it. So whether you like it or not, she is how Quarians look like.
I'm pretty sure the wiki was just edited to fit with the picture. This was just so lazy and half-assed on BW's part that it's mind boggling. It's not really a big deal, but it is indicative of what seems to be a growing trend with this company.