[One would hope that basic biological knowledge is required for being a Troll Medic.]

Humans vary in height and build a bit, but not terribly much. From about here - [Gesture at about five feet from the ground.] - and up; I'm on something of the extreme end of the upper range.

...Actually, my hair color is fairly unusual, too, so perhaps don't take me as an average representative. We definitely don't have any winged or aquatic individuals, though.