Do this again twice using different brushes and use yellow and blue as the colors. You should end up with something similar to the image below.
I then used some splatter brushes
in random colors to add some more detail which you can see below. Feel free to use different brushes but I liked the effect gained from using the splatter brushes.
You now need to find an image of a rainforest or a jungle, ideally something with lots of green plants. I tend to get my stock images from SXC
so copy an image then paste it into your document and move it behind the watercolor strokes then resize it and position it like so.
Select the layer with your jungle image then hold Alt and click on the layer mask button to, this time, create a black layer mask so this will hide your jungle image. Change the foreground color to white then select the layer mask then the brush tool and using a 0% hardness brush of about 100px diameter brush at parts round the parrot to unhide bits of the plants. In this step I only did the bits around the parrots back.