Part 1: Washes
It's important not to go too dark at this stage, and this is more of an underpainting basis for the other layers.
Part 2: Adding Color
In the falcon's wing, you can see how I started adding color to individual feathers. I wanted a bit of a gradient, so I started at the top, with aureolin yellow, then going lower with cadmium orange, then using quinacridone rose and finally Thio violet. Even here, I made sure to use wet-on-wet to encourage the colors to blend cleanly, while using a brush very heavy with pigment. When the paper is wet, if your brush doesn't have a lot of pigment, you're going to end up with a very weak wash.