For this card, I stamped the images with Distress Ink in Walnut Stain and then used a waterbrush to soften the lines and create a base color. I then continued to watercolor with other Distress Inks.
The stamp set, Perched Birds, is from Shady Tree Studio for Inky Antics.
Paper is from Prima and cardstock from A muse.
There's more information, and another card using this stamp, here on my blog: