With "The Messenger," director Su Rynard utilizes the plight of the songbird as a way to warn viewers that environmental catastrophe is here to stay. Instead of creating a valentine to the tiny creatures, the production is more interested in doomsday, generating a sobering look at the dwindling songbird population around the globe and what's causing this troubling loss of life. It's not easy to digest, but "The Messenger" is an important documentary that adds to the discussion of pollution, which arrives in many forms. Read the rest at Blu-ray.com