Then they had to be able to build a nest for the night.

Maybe they've gone off again to build a third nest.

The build their nest over a period of a week.

It's hard to know when she found time to build a nest.

By the time the female built her nest, two months later, the male was long gone.

She had built her nest, and there was no one in it.

Some of them actually just build their nests on the ground.

One female even built a nest in our kitchen window.

She will then fly off to begin building a nest.

The nest is built mostly by the male over about three to eight days.