User blog comment:Lord Loss/Discussion of the Week: Pseudowyverns/@comment-173.85.92.45-20121115153012/@comment-74.193.211.56-20121115155045

^I see what you mean since Gigginox and Khezu share similarities. However Khezu are bipedal meaning they walk on two legs while Gigginox walks on fours. The creatures that are featured in this blog are all quadrupeds, although Tigrex, Nargacuga, and Barioth have been known to ocassionally walk on two legs. Khezu is a biped like Rathian or Diablos meaning they walk on two legs as their form of locomotion. This is why I dislike the term Pseudowyvern as they're still wyverns yet they're quadrupedal. This is why I personally call them Quadruped Wyverns. I hope I explained it good enough for you. :)