“Daughter of a Lost Bird” — a documentary made by and featuring two Montana Native women — is less about closure than about openings. There is no tidy bow at the end, and no singular takeaway. It plays out unapologetically in the realm of loose ends, liminal spaces and uncertainties. Filmmakers/actors Brooke Pepion Swaney and Kendra Potter talk to MTFP about Indigenous identity, adoption, assimilation, and the dramatic necessity of context.