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.
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