The animation is smooth, but a little fast.
The color and video quality seemed bland and muted.
My opinion on the eagle, is it would look more realistic if the flapping wings were slowed down by half a second or a little more. Maybe add a few more in-between frames for the wings.
The backgrounds bothered me a little bit because they did not seem as detailed or as realistic looking as the eagle and looked like clip art.
Another tip is to make the mountain and clouds in the background move twice as fast but at the same pace.
Overall, Its nice and keep animating.