I have to agree with the others. These are just asking for further development, at least in the eyes of the rest of us. I wonder what would happen if you got a small watercolor set and just tried drawing the birds in a thin watercolor wash. You could stay linear like you are now but use a small brush rather than a pencil point to make the marks. That might lead you into painting a bit more easily.
But you always have to do what seems natural to you. I see a very sensitive handling of shape and think that you're very close to making that much richer by the addition of color and texture. Anyway they're a pleasure to see regardless of which direction you take.