As the grasses turn yellow in late summer, the crane family flew in and out of the nest territory several times each day. These frequent excursions probably help improve Pi's flying fitness as well as his navigational skills
On September 4th, Millie seemed more motivated than Roy to take wing. She purred repeatedly while awaiting Roy's commitment to fly.
In the September 7th video segment, the family called energetically and circled the pond before landing. Perhaps such calling reflected rising arousal associated with impending departure?
After such a noisy approach on September 8th, instead of landing, they turned south to start their migration.