User blog comment:Kogath/Monster Hunter X Discussion/@comment-6050823-20160109235530/@comment-5569775-20160110014954

BBD: I assume they just memorize the general area where they heard the roar come from. In Tri, if Peco called for a monster but was dealt enough damage to change areas before the monster showed up, the monster would still show up in the area where it heard the call originate from.

In regards to the info about BFK: Until one is seen defeating a Akantor, or any other "flying wyverns" like it, he doesn't have the right to be called a king in my books. Of course changing Akantor(and the others) to something besides "flying wyvern" would circumvent this as well.