This family of birds looks caught in a moment of contemplation. The mother bird stands in the middle, wings lightly spread and head turned towards an unseen off to the side. Her two babies are on either side, each facing the same direction. Maybe they are wondering about the world outside of their nest, or perhaps are just marveling at the beauty of nature around them.
To bring this picture to life and make it as vibrant as possible, I suggest that the birds be colored with soft pastel colors. The mother bird in a beautiful pink, the babies in baby blue and yellow respectively. In the background, use softer shades of green and yellow for the tree, and a deep blue for the sky. The picture could also be made more interesting with splashes of bright colors like pink, orange, and yellow. The colors could create the illusion of sunrise or sunset, and help bring out the beauty of the family standing on the branch.