“He was sitting on a rock and everybody told him, ‘It’s a rock, it’s not going to hatch,’” Griffard tells the Post. “And all of a sudden, in his mind, it hatched and he has a chick.”
This made me curious, and apparently male eagles play a large part in caring for the young! They're the primary hunters for the first 4 weeks(with the mom becoming the primary later on), primary nest guardians, and develop a brood patch alongside their mate, though males patches are smaller and still more feathery.