Don't put points into its movement speed if you want to glide faster. It glides as fast you run, so putting points into your movement speed will increase how fast it will glide. Hope this saves you from wasting levels like me : )
Oh archaeopteryx, you little chicken on steroids. This little guys is just a whole load of fun. They can carry you over vast distances, but also double as a, hey you seem to be falling, lemme help you out. However, getting down can be a bit of a problem. Otherwise... WOOOOOOHOOOOOOO OH YEAH IM RIDING THE SKY USING THE POWER OF A LITTLE CHICKEN THING
These creatures happen to be one of the best ways to get around, if you know how to use them. Have an ally pick you up with an Argy whilst you are holding one, have them fly up a decent height, and have them let go. You will literally be able to do laps around the map's edges without touching the ground if you know what you're doing! (Some training is required, so that you don't, say, accidentally throw it mid-air.)
I first Tamed one of these lil guys on Scorched Earth. It was so much fun to glide around with. It was also great because I would get around quickly and use less energy. Even more so I would be out of reach of the 10000 sabres, wolves, cargos and thorny dragons. Best 10 mins of my ark life until a guy with his wyvern came and cooked us...
The reload button toggles the glide off and on (always on by default) but beware! If you turn it off and gain fall speed, when you turn glide back on you will be slowed, but not 100% immune to fall damage anymore. You can still survive a fall from the skybox, if you have at least 200hp.