On the front wall of Alma and Monroe's house (most clearly visible to Jr.'s left when she's waiting for Ennis, though it's visible at Thanksgiving, too) is an eagle (?) sculpture. Looks like the wings are raised up, talons extended. Call back to the eagle feather? Another of the Ennis/Jack 'reminders' that are a current (conscious and subconscious) in each others' lives?
And Jr.'s wearing those bluebird earrings.
Two sides of Jack? - one angry, hard, pushed/nailed to the wall (ok, maybe getting carried away here with the symboligizing ) and the other still hopeful, gentle, able to sing/love ?
And another possible resonance to the wild columbine?
A columbarium is "a sepulchral vault or other structure with recesses in the walls to receive the ashes of the dead".
And it's always struck me (and I do mean struck), that in the story they could see, past the hawk's back, "the crawling lights of the vehicles on the plain below" - they weren't that far away from the plains and all that implies. But in the film, I don't get any sense that they could see the plains or crawling lights.