Yet another swap-over.
Ella bringing in more nesting material while Ernie is still in the box.
She lands and simultaneously, Ernie flies off.
Ella still has the nesting material in her beak.
She drops it and does another nesting wriggle.
A quarter of an hour later ...
... in comes Ella ...
... and out goes Ernie.
It is now afternoon, and Ella and Ernie are still at it!
In comes Ella ...
... and out goes Ernie.
Before she leaves, she does another nesting wriggle.
They are still at it towards the end of the day.