As the hatching of the eggs gets closer, the tiercel (male) is working increasingly hard to meet the needs of his mate who is doing the majority of the incubation.
John Blakeman shares this fascinating information about how the tiercel and the formel accomplish the tasks necessary to successfully hatch their eggs:
"The smaller tiercel now has his work cut out for him. During incubation, the formel feels tied to her eggs, keeping them warm. She can no longer head out and sit in a tree waiting at length for a prey animal to scurry by. She’s stuck in the nest for perhaps two or three more weeks of marked nest attachment.
Her days of motherly confinement to the immediate nest area will terminate about two weeks or so after hatching, when the eyasses get big enough to stay warm by themselves during the day.
But for now, the tiercel must now provide food for both himself and his mate. And she’s bigger, too, requiring more food than he does. So his duties are more than doubled.
The nest is not the hawk’s "home" in any human-like manner. Their home is the entire square mile or two of the territory they defend, occupy, and hunt in. Regard the nest exactly as they do, as merely an obstetric space, a place to incubate the eggs and raise the eyasses before they are fledged. The nest is not a hawk home, except perhaps to the eyasses for a few weeks before they fledge. Then, it’s just a pile of sticks. None of the hawks fly back and spend the night nostalgically in the vacant nest. It’s not a hawk residence in any such way. The parents never sleep there except to incubate eggs.