According to the Map's legend, Zone 3 and the tunnel to Zone 2 that follows the river is territory belonging to a feral tribe of<a class="link link--external" href="http://monsterhunter.wikia.com/wiki/Melynx" rel="nofollow ugc noopener" target="_blank">Melynx</a>, small bipedal cats with a tendency to steal anything not nailed down, though not much of a threat to even a lone hunter or huntress.  Travelling through Zones 4 and 6 however will take you through the massive network of caves that run under the massive mountain that occupies the centre of the island.<a class="link link--external" href="http://monsterhunter.wikia.com/wiki/Jaggi" rel="nofollow ugc noopener" target="_blank">Jaggi</a>tend to make their nests in these caves and this territory is relatively dangerous as a result due to their sheer numbers, to say nothing of rumors that one or more of the creatures have grown and survived long enough to take on the status of<a class="link link--external" href="http://monsterhunter.wikia.com/wiki/Great_Jaggi" rel="nofollow ugc noopener" target="_blank">Great Jaggi</a>.  Any of these monsters would be more than capable of going toe-to-toe with any one of the three young huntresses and even as a group of three a Great Jaggi and the many smaller Jaggi that could be roaming the caves could be a serious threat.