who arrives?
Zica returned to the nest with wet feathers on her head and neck. She likely fell into the water after the intruder pushed her out of the nest. The nest is above a flooded mine. She shook her neck, but now her whole body is visibly shivering. It looks like a reaction to the shock and the cold water.
She pooped on the nest rim and slowly returned to her eggs - maintenance (after arrival she observed them only).
After the morning attack, Zica is leaning over the eggs and clattering her bill. Even if the intruder was not visible on camera, she clearly sensed danger. This bill-clattering is a typical defensive signal. Combined with her wet feathers and body shivering later, it shows she was under extreme stress and likely fighting to protect the nest. Or a displacement activity.
Btw. The bill as a resonator: If her whole body was shivering from the cold and shock, her jaws could have been hitting each other uncontrollably. This sounds like bill-clattering, but it is actually a mechanical result of the shivering.
- some maintenance
08.02:40 Zica very carefully settled slowly down