Earlier quoted context omitted.
I went to a presentation on the reintroduction of the bald eagle to New York state. When handling young eagles, the presenter (then much younger) found the best way to immobilize them was stuff them into the leg of her pants (not when she was wearing the pants, mind you.) She had to constantly do this as they fledged, since they couldn't get back up to the platform where the nest was. In the wild, the parents would c…
The Cooper's hawk is known to falconers and rehabbers as fitting perfectly inside a (clean) Pringles can. ;) I must correct you on hacking, though. This process starts with just-fledged raptors, already grown to full size, fully feathered, but raised in closed quarters. They are put in a shelter surrounded by plenty of space for flying where they can see the outdoors, and they are fed daily for a few days to acclimat…
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.