A couple in a small Belgian town are devastated by the accidental death of their young son in this uneven but nonetheless stunning first feature by Thomas de Thier. The boy is fascinated by animals, expressing a wish to “migrate” like birds (which later leads him to wander off), and the sense of wonder reflected in de Their’s nature imagery just as easily colors a scene of the boy enveloped in the light of a TV tube. The long mourning section, which finds the mother mad with grief, is less effective cinematically, though some of the opening’s magic is recovered when she has a fling with an adolescent loner whose immersion in nature mirrors her late son’s. In French with subtitles; the running time is about 110 minutes.