Usually I say stick gathering with images of a heron working on nest material. This Yellow-crowned Night-heron was only interested in small twigs, and despite all his efforts I never saw him take anything to the nest.
Ah, maybe this is the one!
No, he dropped that one and poked around for another option.
You can hardly see the twig sticking out of his beak, and after a minute he dropped that one, too.