Stock photography, photos: willow catkin Stock photos of willow catkin Photograph: © Esa Hiltula Click for a larger image and more information Keywords associated with this stock photo: willow, catkin, pussy, tree, bush, branch, plant, nature, natural, blue, sky, fluffy, soft, white, background, spring, botany, botanic, botanical, flora, season, seasonal, blossom, blossoming, day, daytime, outside, outdoors, detail, close, up, closeup, close-up, macro, diagonal, buds, opening, growth, growing, revival, Salix