When you have the opportunity to photograph a bird, don't just snap one photo and call it the day.
If the opportunity allows photograph the bird in at least three different poses as demonstrated by the three photographs of the Bohemian Waxwings in this article.
The reason you should photograph the bird with different poses is simple. It is to have more than one photograph. For myself, it is important because if I want to sell this photo and when an editor asks for a photograph of the waxwing looking to the right, I can tell him or her I have the photo.
Also, it makes it more challenging when photographing a bird because you may have to pursue the same bird for many years to get a number of different poses.
In this case, it was easy for the Bohemian Waxwing to stand still and turn his head and the light was great.