Egales hunting skills

Question
On Eagles hunting skills

Hi Roger good day!


There was a falconer in one forum that I've read and He was able to raised a Large female African crowned eagle although he is from southeast Asia he was able to trained the eagle there and   the eagle learned how to hunt and quarry a variety of prey like feral dogs, birds, monitor lizard, small mammals and monkey.

In Africa the crowned eagle is known to prey on vervet monkeys, its staple diet consists of monkeys (particularly those of the genus Chlorocebus) and other medium-sized mammals. The long-tailed macaque or crab-eating monkeys are different from the local-African known vervet monkeys they are quite bigger and more aggressive...

One day He tried to hunt macaques in the forest that are usually in troops, maybe he's unfamiliar to the macaques biology He set the eagle to attack the troops of monkey but the monkeys ferociously fights back and attack the eagle which almost rip the eagle into pieces luckily the eagle escapes with no serious injury.

Sorry! for the long Introduction.. :)

My Question is:
How do eagles learned to hunt prey? or their fave prey/staple diet like for example sloth for Harpy eagles, monkeys to Philippine and African crowned eagles.

If the African crowned eagle is a wild one and lived naturally in an area where the macaques are found will It be able to learn how to hunt those monkeys effectively?

They said that eagles learned to hunt by themselves, by instinct  and It doesn't need to be taught by their parents to hunt; either they will learn to discover a new source of food or be killed in the process by trying to prey on animals new to them?

Thank you and more power!
Dave

Answer
Hello, David. Young eagles from wild nests develop their hunting skills on their own, but spend considerable time after they fledge watching their parents and undoubtedly learning by watching what the adults do. The actual skills involved are learned by trial and error. Much of the hunting skill (or at least the drive to hunt) is innate, as human-raised eagles,again through trial and error, learned to hunt for themselves and survive.  In the wild, the adult parents will continue to provide food for some time after fledging, while the newly flighted birds hone not only their hunting skills, but their flying skills. On average, I would say it takes about 4-12 weeks for young eagles to start hunting successfully. True, fully refined, specialized hunting skills, probably take years to develop.
Eagles will learn to take any prey that is big enough and abundant enough for them to live on and will change to a different prey species if the first one becomes rare.
Hope that addresses your questions.