Oh yeah the birds are much larger than those quad copters and could easily handle 90% of them and I agree that they probably would only use them in certain situations. Here in Orlando there are a ton of bald eagles and even though they aren't the biggest they are humongous and could take out...
Too Dangerous for the birds and It seemed like the drone operator cut it off when the eagle grabbed it. One mistake could be a dead eagle but obviously the bird handled it well in a controlled situation, It's still pretty damn cool though.
I have to question the logic of using a protected bird...