First Nest: Hatch!!!
Since I cannot see into the nest, I have to reply on indirect evidence that an egg(s) have hatched.
Mom Kate is showing one of the behaviors.
In her talons she has a mat of litter that has been soiled by the chick.
All birds keep their nests very clean and remove the soiled nesting materials.
Eagles take the used litter far from the nest before letting it drop to the ground.
Dad Petruchio is showing the other good indicator that there has been a hatch: feeding behavior.
Here he is bringing a small fish to the nest.
He then stands just within the nest, pulls the fish apart and leans over to feed the chick.
It didn’t take Petruchio more than a minute to feed the small chick.
Dad Petruchio often takes a moment, as in this photo, and just watches the chick.