User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-68.49.124.68-20130204051221/@comment-6050823-20130206014204

@Dracosaurian I think with Uragaan,they may only come to Moga because of the large amounts of trees and plants in the area.You see in the Hunter Encyclopedia 3,it says "Uragaans feed on plants and tree leaves during their juvenile stage. As they grow older, they develop an appetite for rocks and various minerals.".So I think it's possible that Uragaans that come into the area,only come to give birth to their young,since their young eat plants,when their young.

With Diablos it seems possible since their is a large amount of plants in the area,it could eat.

Now I don't know if you guys noticed but,some monsters have appeared in some areas but,are never seen in the area in-game.One example is,the Rhenoplos appearing in Moga in the intro of MH Tri.May best guess for them not appearing in this area in-game is that they prefer more wide-open areas.Another most recent example is,the Bulldrome and Bullfango corpses in the Tide Island with the Supremacy Pariapuria.As far as things go,they don't even appear in this area in-game but,they must be living in this area if we found or saw those corpses(To let people know,I don't own MHFO so I could be wrong on this.).