Amazing! We watched these tree swallows move over the dunes and go right over our heads. I was in awe. We also watched a merlin and a sharp-shinned hawk prey on tree swallows.
L found owl scat in the dunes and since we would have been there all day otherwise; we relented and let her carry it to the car. (She spent at least an hour of our drive dissecting it and showing us the bones.)