I really like my alla prima painting technique for rendering water. There is something about working wet-on-wet which translates well into making something look wet.
I like to mix several colors on my palette in preparation. This enables me to easily grab the color when needed. Using my flat angled brushes, I'll lay in lines of color gently blending the edges.
Once a section looks wet, I'll move to the next section.
In painting water, I like to have a large block of time. Working with the paint while it is fresh and juicy helps with seamless blending.
For the bird's reflection, I painted some muted, some bright colors and gently blended them in to the surrounding water colors. Note: I paid particular attention to how the water was interacting with the reflection so I have a variety of soft edges.