There were indeed some ripe berries along that stretch, so I began picking. As I carried along, I noticed a little area that seemed kind of hollowed out. I thought maybe it was a chipmunk hole, since I've noticed my chipmunks seem to disappear into little holes along the slopes when they're distressed. You might see the little area I'm talking about just to the left and slightly below centre in this picture.
As I peered down to get a closer look, I realized it wasn't a chipmunk hole, and I realized there was something in it!
Can you see the tiny beaks?
How about now?! Four little baby birds in a wee nest, but it was my first experience with a ground nest built on a slope like that.
When I made a bit of noise, the beaks immediately began to open!
Update: Managed to snap a vaguely decent picture of a parent junco - they move a lot!