Over at EagleCam, the female has laid an egg (ca. 2:50 EST), and a bird is currently sitting on it. Way cool! With any luck, we’ll have at least one chick in about five weeks. Here’s a screenshot I took:
Remember that everything the eagle does in its life—feeding, flying, nesting, grooming, and so on—has, as its evolved “goal”, the production and tending of that egg. There are lots more screenshots here.
I’m pretty sure that’s the female on top of the egg. According to Defenders of Wildlife, both sexes incubate the eggs, but the female (as usual) does most of the work.
If you’ve followed this pair, you’ve seen a lot of twig arranging. Now you’re gonna see a lot of sitting.
h/t: Hempenstein, who spotted the egg first, and Peter, for finding the screenshots.