What makes a landscape painting no a portrait painting? Context! How is that painted?
A portrait calls for one object/person/bird to be more important than the other objects. Biophilia claims all animals are important! How can one have a "center of interest" if one object does not stand out?
Space is the answer! The space between is the cohesion ecologist's talk about and landscape painters present. Simply put a branch in front of the bird and it makes it a landscape. Try it!