User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-15400750-20130815061529/@comment-6050823-20130815212828

Actually so far, there isn't a map of the New World, there is only one of the Old World.

Also there is actually some reasons why some monsters appear in Moga(I actually posted them below).

Great Wroggi and Wroggis: To expand their hunting territory and to find new hunting grounds.

Barroths: Some come do to long droughts in the Sandy Plains that causes their bogs to dry up in the summer heat.

Volvidon: Appears do to much higher insect populations during certain times in Moga.

Uragaan: There really isn't much about the Uragaan but, it seems the most likely reason is to gather plants and tree bark to make nest for their young and its also food for their young.

Duramboros: Seems to appear when large amounts plants grow in the spring season in the Deserted Island.

Diablos: Sometimes when Diablos can't find enough food, they'll goe to Deserted Island(Since apparently the Sandy Plains are said to be close Moga which now explains the Rhenoplos) and eat afew plants found in the area.

Zinogre: It seems some indiviuals may actually come to this area during winter or leave altogether when they sense Amatsumagatsuchi coming to the Misty Peaks(It seems that some Zinogre actually live in this area).

Arzuros: Seems to only come to this area for fish breeding season.