Two little birdies!
I first animated a bird (symbol) flapping its wings, using tweening for a slight dip as it glided, then frame-by-frame animation for the flapping wings.
To make the symbol bird soar across the sky, I used a classic tween. I also adjusted their colour with tint as they flew towards the sunlight. The loop time on the symbols was edited, too, to make the two birds vary slightly.
Overall, I’m happy with this result, considering time limits!