This angry blue bird is perched on a branch, scowling at something off to the side. Its beak is open and its feathers are flared, ready to take flight at a moment's notice. Its wings are outstretched and higher than its head, giving it an imposing presence. In the background, perched on another branch, is a yellow bird, its beak open and wings outstretched. Perhaps it's mimicking the blue bird's stance, or about to join it in flight.
If I were to color this image, I would choose a deep royal blue for the blue bird and a bright, sunny yellow for the yellow bird. I might continue the blue bird's feathers across its back, creating a tail and adding some blues and purple shades for depth and shadowing. I would use a light pink for the branch and use brown, black and gray for additional detailing. Finally, I might add some darker hues to the backgrounds, such as green or a darker shade of blue, to add further depth to the images.