I stand corrected, or at least clarified!
Back in the day of this eagle effort, some four decades ago, she had to track them by eye in the swamps of Montezuma Wildlife Refuge and wade out to retrieve them. Not fun, but hey that's what grad students are for.
Her book: https://www.amazon.com/Return-Sky-Surprising-Eaglets-Restore...
The last effort to reintroduce bald eagles in the US was wound down in Tennessee in 2003. Today they're everywhere and are off the endangered species list. I see them quite often when out birding in the Finger Lakes of New York.
I was driving from Albany to Binghamton last week and spotted my first BE in the wild over 88. Fully mature, bright white head and tail. I'm into hawks and falcons and don't go out of my way to look for BEs, so it was lucky, and pretty neat.
In the Bay Area where I normally live we've had bald eagles nesting in at least 2 locations -- Crystal Springs reservoir, and next to a middle school in Milpitas, which is rather surprising considering how suburban Milpitas is.