You can avoid their attack by flying up and right or left at the same time as soon as they aggro on you, if you can do so before you're dismounted (or if you're a druid), they end up looping up next to you as you move upward and are unable to attack. Another method is to fly up and straight until reaching maximum altitude, then going into a steep dive. Usually, by the time you go into the dive, you'll be at the edge of their chase range. This works because even rare flying mounts can climb faster than the kaliri.