my male canary i think a red factor ... is Always sitting the nest and he is the one putting the materials into it :S

but sometimes he takes them back out ... my female canary (gloster) just sits on the side were the bar is next to the nest.. what does this mean ... ??
the male always sings so im sure he is a male but why does he always take over the nest and acts like he is the one that's going to give birth?

what should i do ?