"10:30 a.m. in Choteau, Montana is the best time to look for snow geese in the barley fields. That’s what Dave says. He picks us up in his old Chevy truck, the one with 375k miles and a “check engine” light that’s been glowing on the dash for over a decade. Dave is eighty-four now—a nasal tube looped beneath his trucker hat, a portable oxygen concentrator humming in the front seat—but the way my grandma looks at him, you’d think they were both nineteen."