User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-5020152-20130305143423/@comment-192.26.140.244-20130305194210

Yea a fully grown aptonoth is just as tall as rathalos (I was just playing Tri and saw it). So it most likely weighs more than Rathalos. And in real life a pitfall trap is triggered when a certain amount of weight is put on it and anything over the max weight, so an aptonoth would most likely be trapped in one. As for ingame, why this doesn't happen is probably because you can just walk up to aptonoth without them attacking you so it would make for a boring capture quest and also so they don't fall in when you are trying to capture rathalos.