This nesting spot was being built Very, Very, slowly. The female sat and placed the sticks where she wanted them. The male went and brought back a few more. And then he didn’t come back.
She waited, and waited. While hanging around she broke off pieces of the nest tree itself. Probably frustrated.
Finally she flew down to the swamp edge and did his job too.
Eventually he came back, got yelled at (they actually do that), and he got with the program.