According to laws of anatomy, Wanaxes should not be able to stand, its legs are too short to support its body weight and would break after some period of time. The Wanax of course spends the majority of its lifespan standing upright anyways, because this is a work of fiction.
Wickins are an odd bunch, they have a hierarchy system focused mostly on its females with the males usually being smaller and weaker are settled at the lower ranks with little chance to move up. The males only hope is to move to another group and hope hes accepted or wait for his upper class to die out, hierarchies devoted to its males are fortunately not a rare occurrance.
Duskins are the most human of the three, nuff said.