The use of negative space can often create the mood that you want your picture to set. In this case a robin on a fence post creates the start of a storyline that the viewer can fill in and extend. The negative space engages the viewer to explore what is happening. A tight shot of the robin would make the picture all about the robin which would make it just another robin picture.
Some days are better for wildlife photography and some days are better for landscapes. Today, no wildlife and no landscape so a perfect day to sit by the fire.