Avatar Frontiers of Pandora walkthrough is here. The hero finally get the flying mount the Ikran, and uses the flying mount and get back to Aranahe home tree, to check if the heavy bow is available.
Get the flying mount after find the hunter quest and rescue the other hunter, but not his ikran. This will trigger the Kinglor quest. Get the Ikran from the Ikran rookery after the Kinglor quest, where the hero gets to fly as the Queen Kinglor.