User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-24718086-20140406215011/@comment-4009941-20140406222954

I actually got your answers.

Official Translated Edited maps here of the Old World(1st gen, 2nd gen, Frontier, and 4th(Heavenly Mountains in Shiki/Siki Country) http://monsterhunter.wikia.com/wiki/World_of_Monster_Hunter

And all Prey species seem to interact peacefully with each other like a big community in all I seen. Iopery, Velociprey, Genprey and Giaprey I have seen all in the same habitat the Great Forest just outside the Tower. While 4th gen seems to be a traveling game in the series going from Barubare region off the map, to the Old World Main Land Castle Schrade and the Island Country of Shiki for the Heavenly Mountains. If 4th gen exclusive zones are close to the Great Forest not far from the Tower that also shows up in all gens, Then I wouldn't be surprised to see Preys.

According to official MH info from Capcom. Great Jaggi's ancestor is actually Velociprey who are according to Capcom the ancestor of all the raptor Bird Wyverns we know of in game. So add this I understand that maybe some Jaggi remained in the land of their origin maybe? and stayed with their far off Velociprey cousins.