Rathalos Ecology

Disclaimer:: This is merely a plausible explanation for the monster(s) in this article, and should not be considered canon.

In-Game Information
Male Wyvern that keeps a nest and patrols its patch of territory from the air in search of prey. Its claws are filled with a poison that weakens its quarry.

Taxonomy
(Processing Information)

Habitat Range
Forest and hills

Ecological Niche
Alpha predator

Biological Adaptations
(Processing Information)

Behavior
The Rathalos probably keeps the cave in the Forest and Hills as its main area of territory alongside its female counterpart Rathian as it sleeps in that area. Also, exclusive to Rathalos, he seems a lot more prone to doing his "Swoop from the Sky" attack in area 4, this may be due to the fact that he is able to monitor his main area of territory within that area or it may be a funny coincidence. Who knows?