This way we get the feeling that we have moved, rather than the subject. Generally it is best not to disorientate the audience, unless that is your objective. Make sure you can see your subject clearly. Try to find a background that maximises contrast but is not distracting or garish. Avoid distracting objects in the background or foreground as they lead the eye away from the subject.
Place objects in a way that reflects their function or state.
By this I mean place hanging objects around the upper part of the screen and objects that sit on the ground in the lower part of the screen. When the bird lands, I would try and show the whole bird, keeping the centre of the bird toward the lower part of the screen. Avoid horizontal and vertical lines as these tend to flatten the image. Instead, try and shoot angled lines as this emphasizes depth. Angled lines can also help lead the viewer's eye toward the subject.