On FB the Raptor Resource project said this:
With true branching expected at any time, an eaglet decides to try out one of the crib rails. Variously referred to by viewers as "twigging," "brailing," "sticking," "railing," etc.
This is not actual branching, but it was very fun to see! Actual branching is when the eaglet does a short flight to a nearby branch in the tree such as the "Y" branch, and then flies back to the nest. They will do this several times before they actually fledge (take their maiden flights). Typically once they branch, they choose to perch on the branches at night rather than sleep lying down in the nest. They do come back and forth to the nest to socialize with each other and also have been known to take naps in the nest during the day. They will come to the nest for food drops.... or to state that better.... they will RUN down the branches and "hop fly" into the nest for food, at which time the parents make a quick dash to get out of the way. The same applies to after they fledge, they still come back and forth to the nest, and if we are lucky enough and the camera crew is panning at the right time, hopefully they can catch some shots of them chasing Mom and Dad for food.
It will still be a little while before we have to say goodbye.